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Finding the Fourth Proportional to 1,284.38, 1,772.41 and 724.83

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Solution

The fourth proportional to 1,284.38, 1,772.41 and 724.83 is: 1,000.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.38 : 1,772.41 = 724.83 : x
  2. Step 2: Convert to fraction form
    1,284.38/1,772.41 = 724.83/x
  3. Step 3: Cross multiply
    1,284.38x = 1,772.41 × 724.83
  4. Step 4: Simplify right side
    1,284.38x = 1,284,694.13
  5. Step 5: Solve for x
    x = 1,284,694.13/1,284.38
  6. Step 6: Final answer
    x = 1,000.25

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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.