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Finding the Fourth Proportional to 1,724.28, 2,587.18 and 983.86

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Solution

The fourth proportional to 1,724.28, 2,587.18 and 983.86 is: 1,476.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,724.28 : 2,587.18 = 983.86 : x
  2. Step 2: Convert to fraction form
    1,724.28/2,587.18 = 983.86/x
  3. Step 3: Cross multiply
    1,724.28x = 2,587.18 × 983.86
  4. Step 4: Simplify right side
    1,724.28x = 2,545,422.91
  5. Step 5: Solve for x
    x = 2,545,422.91/1,724.28
  6. Step 6: Final answer
    x = 1,476.22

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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.