Home / 1,139,236.38-1,572,142.10-642,480.80

Finding the Fourth Proportional to 1,139,236.38, 1,572,142.10 and 642,480.80

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Solution

The fourth proportional to 1,139,236.38, 1,572,142.10 and 642,480.80 is: 886,621.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139,236.38 : 1,572,142.10 = 642,480.80 : x
  2. Step 2: Convert to fraction form
    1,139,236.38/1,572,142.10 = 642,480.80/x
  3. Step 3: Cross multiply
    1,139,236.38x = 1,572,142.10 × 642,480.80
  4. Step 4: Simplify right side
    1,139,236.38x = 1,010,071,103,048.57
  5. Step 5: Solve for x
    x = 1,010,071,103,048.57/1,139,236.38
  6. Step 6: Final answer
    x = 886,621.18

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Double scale
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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.