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Finding the Fourth Proportional to 717.04, 989.17 and 637.26

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Solution

The fourth proportional to 717.04, 989.17 and 637.26 is: 879.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.04 : 989.17 = 637.26 : x
  2. Step 2: Convert to fraction form
    717.04/989.17 = 637.26/x
  3. Step 3: Cross multiply
    717.04x = 989.17 × 637.26
  4. Step 4: Simplify right side
    717.04x = 630,358.47
  5. Step 5: Solve for x
    x = 630,358.47/717.04
  6. Step 6: Final answer
    x = 879.11

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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.