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Finding the Fourth Proportional to 1,449.92, 1,997.76 and 983.36

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Solution

The fourth proportional to 1,449.92, 1,997.76 and 983.36 is: 1,354.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.92 : 1,997.76 = 983.36 : x
  2. Step 2: Convert to fraction form
    1,449.92/1,997.76 = 983.36/x
  3. Step 3: Cross multiply
    1,449.92x = 1,997.76 × 983.36
  4. Step 4: Simplify right side
    1,449.92x = 1,964,517.27
  5. Step 5: Solve for x
    x = 1,964,517.27/1,449.92
  6. Step 6: Final answer
    x = 1,354.91

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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.