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Finding the Fourth Proportional to 373.92, 515.57 and 331.87

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Solution

The fourth proportional to 373.92, 515.57 and 331.87 is: 457.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.92 : 515.57 = 331.87 : x
  2. Step 2: Convert to fraction form
    373.92/515.57 = 331.87/x
  3. Step 3: Cross multiply
    373.92x = 515.57 × 331.87
  4. Step 4: Simplify right side
    373.92x = 171,102.22
  5. Step 5: Solve for x
    x = 171,102.22/373.92
  6. Step 6: Final answer
    x = 457.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.