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Finding the Fourth Proportional to 372.69, 558.98 and 98.81

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Solution

The fourth proportional to 372.69, 558.98 and 98.81 is: 148.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.69 : 558.98 = 98.81 : x
  2. Step 2: Convert to fraction form
    372.69/558.98 = 98.81/x
  3. Step 3: Cross multiply
    372.69x = 558.98 × 98.81
  4. Step 4: Simplify right side
    372.69x = 55,230.27
  5. Step 5: Solve for x
    x = 55,230.27/372.69
  6. Step 6: Final answer
    x = 148.19

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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.