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Finding the Fourth Proportional to 661,125.90, 912,042 and 479,439.39

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Solution

The fourth proportional to 661,125.90, 912,042 and 479,439.39 is: 661,400.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,125.90 : 912,042 = 479,439.39 : x
  2. Step 2: Convert to fraction form
    661,125.90/912,042 = 479,439.39/x
  3. Step 3: Cross multiply
    661,125.90x = 912,042 × 479,439.39
  4. Step 4: Simplify right side
    661,125.90x = 437,268,860,134.38
  5. Step 5: Solve for x
    x = 437,268,860,134.38/661,125.90
  6. Step 6: Final answer
    x = 661,400.29

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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.