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Finding the Fourth Proportional to 356.53, 531.65 and 331.87

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Solution

The fourth proportional to 356.53, 531.65 and 331.87 is: 494.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.53 : 531.65 = 331.87 : x
  2. Step 2: Convert to fraction form
    356.53/531.65 = 331.87/x
  3. Step 3: Cross multiply
    356.53x = 531.65 × 331.87
  4. Step 4: Simplify right side
    356.53x = 176,438.69
  5. Step 5: Solve for x
    x = 176,438.69/356.53
  6. Step 6: Final answer
    x = 494.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.