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Finding the Fourth Proportional to 521,939.10, 729,140.10 and 521,939.10

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Solution

The fourth proportional to 521,939.10, 729,140.10 and 521,939.10 is: 729,140.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,939.10 : 729,140.10 = 521,939.10 : x
  2. Step 2: Convert to fraction form
    521,939.10/729,140.10 = 521,939.10/x
  3. Step 3: Cross multiply
    521,939.10x = 729,140.10 × 521,939.10
  4. Step 4: Simplify right side
    521,939.10x = 380,566,727,567.91
  5. Step 5: Solve for x
    x = 380,566,727,567.91/521,939.10
  6. Step 6: Final answer
    x = 729,140.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.