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Finding the Fourth Proportional to 331.83, 497.82 and 100.74

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Solution

The fourth proportional to 331.83, 497.82 and 100.74 is: 151.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.83 : 497.82 = 100.74 : x
  2. Step 2: Convert to fraction form
    331.83/497.82 = 100.74/x
  3. Step 3: Cross multiply
    331.83x = 497.82 × 100.74
  4. Step 4: Simplify right side
    331.83x = 50,150.39
  5. Step 5: Solve for x
    x = 50,150.39/331.83
  6. Step 6: Final answer
    x = 151.13

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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.