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Finding the Fourth Proportional to 1,025.74, 1,414.78 and 671

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Solution

The fourth proportional to 1,025.74, 1,414.78 and 671 is: 925.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.74 : 1,414.78 = 671 : x
  2. Step 2: Convert to fraction form
    1,025.74/1,414.78 = 671/x
  3. Step 3: Cross multiply
    1,025.74x = 1,414.78 × 671
  4. Step 4: Simplify right side
    1,025.74x = 949,317.38
  5. Step 5: Solve for x
    x = 949,317.38/1,025.74
  6. Step 6: Final answer
    x = 925.50

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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.