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Finding the Fourth Proportional to 373.10, 559.64 and 99.19

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Solution

The fourth proportional to 373.10, 559.64 and 99.19 is: 148.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.10 : 559.64 = 99.19 : x
  2. Step 2: Convert to fraction form
    373.10/559.64 = 99.19/x
  3. Step 3: Cross multiply
    373.10x = 559.64 × 99.19
  4. Step 4: Simplify right side
    373.10x = 55,508.80
  5. Step 5: Solve for x
    x = 55,508.80/373.10
  6. Step 6: Final answer
    x = 148.78

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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.