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Finding the Fourth Proportional to 676.71, 934.61 and 667.61

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Solution

The fourth proportional to 676.71, 934.61 and 667.61 is: 922.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.71 : 934.61 = 667.61 : x
  2. Step 2: Convert to fraction form
    676.71/934.61 = 667.61/x
  3. Step 3: Cross multiply
    676.71x = 934.61 × 667.61
  4. Step 4: Simplify right side
    676.71x = 623,946.97
  5. Step 5: Solve for x
    x = 623,946.97/676.71
  6. Step 6: Final answer
    x = 922.03

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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.