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Finding the Fourth Proportional to 373.72, 560.57 and 99.81

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Solution

The fourth proportional to 373.72, 560.57 and 99.81 is: 149.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.72 : 560.57 = 99.81 : x
  2. Step 2: Convert to fraction form
    373.72/560.57 = 99.81/x
  3. Step 3: Cross multiply
    373.72x = 560.57 × 99.81
  4. Step 4: Simplify right side
    373.72x = 55,950.49
  5. Step 5: Solve for x
    x = 55,950.49/373.72
  6. Step 6: Final answer
    x = 149.71

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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.