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Finding the Fourth Proportional to 402,757.38, 555,840.60 and 221,501.25

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Solution

The fourth proportional to 402,757.38, 555,840.60 and 221,501.25 is: 305,691.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,757.38 : 555,840.60 = 221,501.25 : x
  2. Step 2: Convert to fraction form
    402,757.38/555,840.60 = 221,501.25/x
  3. Step 3: Cross multiply
    402,757.38x = 555,840.60 × 221,501.25
  4. Step 4: Simplify right side
    402,757.38x = 123,119,387,700.75
  5. Step 5: Solve for x
    x = 123,119,387,700.75/402,757.38
  6. Step 6: Final answer
    x = 305,691.20

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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.