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Finding the Fourth Proportional to 676.88, 1,013.88 and 627.92

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Solution

The fourth proportional to 676.88, 1,013.88 and 627.92 is: 940.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.88 : 1,013.88 = 627.92 : x
  2. Step 2: Convert to fraction form
    676.88/1,013.88 = 627.92/x
  3. Step 3: Cross multiply
    676.88x = 1,013.88 × 627.92
  4. Step 4: Simplify right side
    676.88x = 636,635.53
  5. Step 5: Solve for x
    x = 636,635.53/676.88
  6. Step 6: Final answer
    x = 940.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.