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Finding the Fourth Proportional to 717.16, 990.20 and 559.97

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Solution

The fourth proportional to 717.16, 990.20 and 559.97 is: 773.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.16 : 990.20 = 559.97 : x
  2. Step 2: Convert to fraction form
    717.16/990.20 = 559.97/x
  3. Step 3: Cross multiply
    717.16x = 990.20 × 559.97
  4. Step 4: Simplify right side
    717.16x = 554,479.49
  5. Step 5: Solve for x
    x = 554,479.49/717.16
  6. Step 6: Final answer
    x = 773.17

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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.