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Finding the Fourth Proportional to 1,323.71, 1,983.85 and 992.04

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Solution

The fourth proportional to 1,323.71, 1,983.85 and 992.04 is: 1,486.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.71 : 1,983.85 = 992.04 : x
  2. Step 2: Convert to fraction form
    1,323.71/1,983.85 = 992.04/x
  3. Step 3: Cross multiply
    1,323.71x = 1,983.85 × 992.04
  4. Step 4: Simplify right side
    1,323.71x = 1,968,059.79
  5. Step 5: Solve for x
    x = 1,968,059.79/1,323.71
  6. Step 6: Final answer
    x = 1,486.78

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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.