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Finding the Fourth Proportional to 922.68, 1,271.86 and 627.44

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Solution

The fourth proportional to 922.68, 1,271.86 and 627.44 is: 864.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.68 : 1,271.86 = 627.44 : x
  2. Step 2: Convert to fraction form
    922.68/1,271.86 = 627.44/x
  3. Step 3: Cross multiply
    922.68x = 1,271.86 × 627.44
  4. Step 4: Simplify right side
    922.68x = 798,007.91
  5. Step 5: Solve for x
    x = 798,007.91/922.68
  6. Step 6: Final answer
    x = 864.88

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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.