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Finding the Fourth Proportional to 717.22, 989.31 and 632.98

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Solution

The fourth proportional to 717.22, 989.31 and 632.98 is: 873.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.22 : 989.31 = 632.98 : x
  2. Step 2: Convert to fraction form
    717.22/989.31 = 632.98/x
  3. Step 3: Cross multiply
    717.22x = 989.31 × 632.98
  4. Step 4: Simplify right side
    717.22x = 626,213.44
  5. Step 5: Solve for x
    x = 626,213.44/717.22
  6. Step 6: Final answer
    x = 873.11

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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.