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Finding the Fourth Proportional to 717.19, 990.08 and 547.76

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Solution

The fourth proportional to 717.19, 990.08 and 547.76 is: 756.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.19 : 990.08 = 547.76 : x
  2. Step 2: Convert to fraction form
    717.19/990.08 = 547.76/x
  3. Step 3: Cross multiply
    717.19x = 990.08 × 547.76
  4. Step 4: Simplify right side
    717.19x = 542,321.27
  5. Step 5: Solve for x
    x = 542,321.27/717.19
  6. Step 6: Final answer
    x = 756.18

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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.