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Finding the Fourth Proportional to 1,250.97, 1,872.51 and 858.68

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Solution

The fourth proportional to 1,250.97, 1,872.51 and 858.68 is: 1,285.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,250.97 : 1,872.51 = 858.68 : x
  2. Step 2: Convert to fraction form
    1,250.97/1,872.51 = 858.68/x
  3. Step 3: Cross multiply
    1,250.97x = 1,872.51 × 858.68
  4. Step 4: Simplify right side
    1,250.97x = 1,607,877.52
  5. Step 5: Solve for x
    x = 1,607,877.52/1,250.97
  6. Step 6: Final answer
    x = 1,285.30

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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.