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Finding the Fourth Proportional to 3,129.96, 4,691.16 and 1,399.80

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Solution

The fourth proportional to 3,129.96, 4,691.16 and 1,399.80 is: 2,098.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.96 : 4,691.16 = 1,399.80 : x
  2. Step 2: Convert to fraction form
    3,129.96/4,691.16 = 1,399.80/x
  3. Step 3: Cross multiply
    3,129.96x = 4,691.16 × 1,399.80
  4. Step 4: Simplify right side
    3,129.96x = 6,566,685.77
  5. Step 5: Solve for x
    x = 6,566,685.77/3,129.96
  6. Step 6: Final answer
    x = 2,098.01

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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.