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Finding the Fourth Proportional to 717.08, 987.53 and 616.73

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Solution

The fourth proportional to 717.08, 987.53 and 616.73 is: 849.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.08 : 987.53 = 616.73 : x
  2. Step 2: Convert to fraction form
    717.08/987.53 = 616.73/x
  3. Step 3: Cross multiply
    717.08x = 987.53 × 616.73
  4. Step 4: Simplify right side
    717.08x = 609,031.36
  5. Step 5: Solve for x
    x = 609,031.36/717.08
  6. Step 6: Final answer
    x = 849.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.