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Finding the Fourth Proportional to 372.35, 558.72 and 207.86

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Solution

The fourth proportional to 372.35, 558.72 and 207.86 is: 311.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.35 : 558.72 = 207.86 : x
  2. Step 2: Convert to fraction form
    372.35/558.72 = 207.86/x
  3. Step 3: Cross multiply
    372.35x = 558.72 × 207.86
  4. Step 4: Simplify right side
    372.35x = 116,132.75
  5. Step 5: Solve for x
    x = 116,132.75/372.35
  6. Step 6: Final answer
    x = 311.90

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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.