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Finding the Fourth Proportional to 1,025.21, 1,414.67 and 627.06

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Solution

The fourth proportional to 1,025.21, 1,414.67 and 627.06 is: 865.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.21 : 1,414.67 = 627.06 : x
  2. Step 2: Convert to fraction form
    1,025.21/1,414.67 = 627.06/x
  3. Step 3: Cross multiply
    1,025.21x = 1,414.67 × 627.06
  4. Step 4: Simplify right side
    1,025.21x = 887,082.97
  5. Step 5: Solve for x
    x = 887,082.97/1,025.21
  6. Step 6: Final answer
    x = 865.27

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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.