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Finding the Fourth Proportional to 372.78, 558.08 and 348.43

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Solution

The fourth proportional to 372.78, 558.08 and 348.43 is: 521.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.78 : 558.08 = 348.43 : x
  2. Step 2: Convert to fraction form
    372.78/558.08 = 348.43/x
  3. Step 3: Cross multiply
    372.78x = 558.08 × 348.43
  4. Step 4: Simplify right side
    372.78x = 194,451.81
  5. Step 5: Solve for x
    x = 194,451.81/372.78
  6. Step 6: Final answer
    x = 521.63

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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.