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Finding the Fourth Proportional to 372.35, 558.57 and 98.45

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Solution

The fourth proportional to 372.35, 558.57 and 98.45 is: 147.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.35 : 558.57 = 98.45 : x
  2. Step 2: Convert to fraction form
    372.35/558.57 = 98.45/x
  3. Step 3: Cross multiply
    372.35x = 558.57 × 98.45
  4. Step 4: Simplify right side
    372.35x = 54,990.33
  5. Step 5: Solve for x
    x = 54,990.33/372.35
  6. Step 6: Final answer
    x = 147.68

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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.