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Finding the Fourth Proportional to 2,551.75, 3,521.42 and 1,447.75

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Solution

The fourth proportional to 2,551.75, 3,521.42 and 1,447.75 is: 1,997.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,551.75 : 3,521.42 = 1,447.75 : x
  2. Step 2: Convert to fraction form
    2,551.75/3,521.42 = 1,447.75/x
  3. Step 3: Cross multiply
    2,551.75x = 3,521.42 × 1,447.75
  4. Step 4: Simplify right side
    2,551.75x = 5,098,135.81
  5. Step 5: Solve for x
    x = 5,098,135.81/2,551.75
  6. Step 6: Final answer
    x = 1,997.90

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1.5x scale

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.