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Finding the Fourth Proportional to 373.79, 560.60 and 99.86

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Solution

The fourth proportional to 373.79, 560.60 and 99.86 is: 149.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.79 : 560.60 = 99.86 : x
  2. Step 2: Convert to fraction form
    373.79/560.60 = 99.86/x
  3. Step 3: Cross multiply
    373.79x = 560.60 × 99.86
  4. Step 4: Simplify right side
    373.79x = 55,978.21
  5. Step 5: Solve for x
    x = 55,978.21/373.79
  6. Step 6: Final answer
    x = 149.76

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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.