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Finding the Fourth Proportional to 1,814.92, 2,721.68 and 992.04

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Solution

The fourth proportional to 1,814.92, 2,721.68 and 992.04 is: 1,487.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,814.92 : 2,721.68 = 992.04 : x
  2. Step 2: Convert to fraction form
    1,814.92/2,721.68 = 992.04/x
  3. Step 3: Cross multiply
    1,814.92x = 2,721.68 × 992.04
  4. Step 4: Simplify right side
    1,814.92x = 2,700,015.43
  5. Step 5: Solve for x
    x = 2,700,015.43/1,814.92
  6. Step 6: Final answer
    x = 1,487.68

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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.