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Finding the Fourth Proportional to 2,039.64, 3,061.20 and 807.92

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Solution

The fourth proportional to 2,039.64, 3,061.20 and 807.92 is: 1,212.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,039.64 : 3,061.20 = 807.92 : x
  2. Step 2: Convert to fraction form
    2,039.64/3,061.20 = 807.92/x
  3. Step 3: Cross multiply
    2,039.64x = 3,061.20 × 807.92
  4. Step 4: Simplify right side
    2,039.64x = 2,473,204.70
  5. Step 5: Solve for x
    x = 2,473,204.70/2,039.64
  6. Step 6: Final answer
    x = 1,212.57

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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.