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Finding the Fourth Proportional to 514.73, 772.10 and 129.98

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Solution

The fourth proportional to 514.73, 772.10 and 129.98 is: 194.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.73 : 772.10 = 129.98 : x
  2. Step 2: Convert to fraction form
    514.73/772.10 = 129.98/x
  3. Step 3: Cross multiply
    514.73x = 772.10 × 129.98
  4. Step 4: Simplify right side
    514.73x = 100,359.81
  5. Step 5: Solve for x
    x = 100,359.81/514.73
  6. Step 6: Final answer
    x = 194.97

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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.