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Finding the Fourth Proportional to 331.60, 497.88 and 315.92

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Solution

The fourth proportional to 331.60, 497.88 and 315.92 is: 474.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.60 : 497.88 = 315.92 : x
  2. Step 2: Convert to fraction form
    331.60/497.88 = 315.92/x
  3. Step 3: Cross multiply
    331.60x = 497.88 × 315.92
  4. Step 4: Simplify right side
    331.60x = 157,290.25
  5. Step 5: Solve for x
    x = 157,290.25/331.60
  6. Step 6: Final answer
    x = 474.34

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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.