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Finding the Fourth Proportional to 331,490.10, 497,235.15 and 121,278.90

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Solution

The fourth proportional to 331,490.10, 497,235.15 and 121,278.90 is: 181,918.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,490.10 : 497,235.15 = 121,278.90 : x
  2. Step 2: Convert to fraction form
    331,490.10/497,235.15 = 121,278.90/x
  3. Step 3: Cross multiply
    331,490.10x = 497,235.15 × 121,278.90
  4. Step 4: Simplify right side
    331,490.10x = 60,304,132,033.34
  5. Step 5: Solve for x
    x = 60,304,132,033.34/331,490.10
  6. Step 6: Final answer
    x = 181,918.35

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Similar ratio
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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.