Home / 1,237,105,141.92-1,707,103,388.16-728,386,987.68

Finding the Fourth Proportional to 1,237,105,141.92, 1,707,103,388.16 and 728,386,987.68

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Solution

The fourth proportional to 1,237,105,141.92, 1,707,103,388.16 and 728,386,987.68 is: 1,005,114,159.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237,105,141.92 : 1,707,103,388.16 = 728,386,987.68 : x
  2. Step 2: Convert to fraction form
    1,237,105,141.92/1,707,103,388.16 = 728,386,987.68/x
  3. Step 3: Cross multiply
    1,237,105,141.92x = 1,707,103,388.16 × 728,386,987.68
  4. Step 4: Simplify right side
    1,237,105,141.92x = 1,243,431,894,560,184,064
  5. Step 5: Solve for x
    x = 1,243,431,894,560,184,064/1,237,105,141.92
  6. Step 6: Final answer
    x = 1,005,114,159.20

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Double scale
Find fourth proportional to 1,237,105,142.92, 1,707,103,389.54 and 728,386,988.68
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.