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Finding the Fourth Proportional to 331.47, 497.05 and 100.30

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Solution

The fourth proportional to 331.47, 497.05 and 100.30 is: 150.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.47 : 497.05 = 100.30 : x
  2. Step 2: Convert to fraction form
    331.47/497.05 = 100.30/x
  3. Step 3: Cross multiply
    331.47x = 497.05 × 100.30
  4. Step 4: Simplify right side
    331.47x = 49,854.12
  5. Step 5: Solve for x
    x = 49,854.12/331.47
  6. Step 6: Final answer
    x = 150.40

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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.