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Finding the Fourth Proportional to 404,877.10, 607,315.65 and 138,613.90

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Solution

The fourth proportional to 404,877.10, 607,315.65 and 138,613.90 is: 207,920.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,877.10 : 607,315.65 = 138,613.90 : x
  2. Step 2: Convert to fraction form
    404,877.10/607,315.65 = 138,613.90/x
  3. Step 3: Cross multiply
    404,877.10x = 607,315.65 × 138,613.90
  4. Step 4: Simplify right side
    404,877.10x = 84,182,390,777.54
  5. Step 5: Solve for x
    x = 84,182,390,777.54/404,877.10
  6. Step 6: Final answer
    x = 207,920.85

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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.