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Finding the Fourth Proportional to 261,567.38, 392,354.72 and 74,578.88

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Solution

The fourth proportional to 261,567.38, 392,354.72 and 74,578.88 is: 111,869.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,567.38 : 392,354.72 = 74,578.88 : x
  2. Step 2: Convert to fraction form
    261,567.38/392,354.72 = 74,578.88/x
  3. Step 3: Cross multiply
    261,567.38x = 392,354.72 × 74,578.88
  4. Step 4: Simplify right side
    261,567.38x = 29,261,375,580.31
  5. Step 5: Solve for x
    x = 29,261,375,580.31/261,567.38
  6. Step 6: Final answer
    x = 111,869.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.