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Finding the Fourth Proportional to 331,443.36, 497,086.20 and 91,551.95

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Solution

The fourth proportional to 331,443.36, 497,086.20 and 91,551.95 is: 137,306.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,443.36 : 497,086.20 = 91,551.95 : x
  2. Step 2: Convert to fraction form
    331,443.36/497,086.20 = 91,551.95/x
  3. Step 3: Cross multiply
    331,443.36x = 497,086.20 × 91,551.95
  4. Step 4: Simplify right side
    331,443.36x = 45,509,209,294.91
  5. Step 5: Solve for x
    x = 45,509,209,294.91/331,443.36
  6. Step 6: Final answer
    x = 137,306.14

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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.