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Finding the Fourth Proportional to 1,251.32, 1,874.52 and 1,020.50

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Solution

The fourth proportional to 1,251.32, 1,874.52 and 1,020.50 is: 1,528.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.32 : 1,874.52 = 1,020.50 : x
  2. Step 2: Convert to fraction form
    1,251.32/1,874.52 = 1,020.50/x
  3. Step 3: Cross multiply
    1,251.32x = 1,874.52 × 1,020.50
  4. Step 4: Simplify right side
    1,251.32x = 1,912,947.66
  5. Step 5: Solve for x
    x = 1,912,947.66/1,251.32
  6. Step 6: Final answer
    x = 1,528.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.