Home / 939,145.40-1,296,021.30-509,424.20

Finding the Fourth Proportional to 939,145.40, 1,296,021.30 and 509,424.20

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Solution

The fourth proportional to 939,145.40, 1,296,021.30 and 509,424.20 is: 703,005.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,145.40 : 1,296,021.30 = 509,424.20 : x
  2. Step 2: Convert to fraction form
    939,145.40/1,296,021.30 = 509,424.20/x
  3. Step 3: Cross multiply
    939,145.40x = 1,296,021.30 × 509,424.20
  4. Step 4: Simplify right side
    939,145.40x = 660,224,613,935.46
  5. Step 5: Solve for x
    x = 660,224,613,935.46/939,145.40
  6. Step 6: Final answer
    x = 703,005.75

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Double scale
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Similar ratio
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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.