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Finding the Fourth Proportional to 717.42, 988.26 and 672.06

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Solution

The fourth proportional to 717.42, 988.26 and 672.06 is: 925.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.42 : 988.26 = 672.06 : x
  2. Step 2: Convert to fraction form
    717.42/988.26 = 672.06/x
  3. Step 3: Cross multiply
    717.42x = 988.26 × 672.06
  4. Step 4: Simplify right side
    717.42x = 664,170.02
  5. Step 5: Solve for x
    x = 664,170.02/717.42
  6. Step 6: Final answer
    x = 925.78

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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.