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Finding the Fourth Proportional to 610.91, 916.89 and 514.47

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Solution

The fourth proportional to 610.91, 916.89 and 514.47 is: 772.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.91 : 916.89 = 514.47 : x
  2. Step 2: Convert to fraction form
    610.91/916.89 = 514.47/x
  3. Step 3: Cross multiply
    610.91x = 916.89 × 514.47
  4. Step 4: Simplify right side
    610.91x = 471,713.09
  5. Step 5: Solve for x
    x = 471,713.09/610.91
  6. Step 6: Final answer
    x = 772.15

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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.