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Finding the Fourth Proportional to 922.46, 1,271.76 and 627.22

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Solution

The fourth proportional to 922.46, 1,271.76 and 627.22 is: 864.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.46 : 1,271.76 = 627.22 : x
  2. Step 2: Convert to fraction form
    922.46/1,271.76 = 627.22/x
  3. Step 3: Cross multiply
    922.46x = 1,271.76 × 627.22
  4. Step 4: Simplify right side
    922.46x = 797,673.31
  5. Step 5: Solve for x
    x = 797,673.31/922.46
  6. Step 6: Final answer
    x = 864.72

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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.