Home / 3,129.13-4,318.50-1,731.88

Finding the Fourth Proportional to 3,129.13, 4,318.50 and 1,731.88

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Solution

The fourth proportional to 3,129.13, 4,318.50 and 1,731.88 is: 2,390.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.13 : 4,318.50 = 1,731.88 : x
  2. Step 2: Convert to fraction form
    3,129.13/4,318.50 = 1,731.88/x
  3. Step 3: Cross multiply
    3,129.13x = 4,318.50 × 1,731.88
  4. Step 4: Simplify right side
    3,129.13x = 7,479,093.53
  5. Step 5: Solve for x
    x = 7,479,093.53/3,129.13
  6. Step 6: Final answer
    x = 2,390.15

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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.