Home / 3,129.78-4,318.92-1,732.62

Finding the Fourth Proportional to 3,129.78, 4,318.92 and 1,732.62

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Solution

The fourth proportional to 3,129.78, 4,318.92 and 1,732.62 is: 2,390.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.78 : 4,318.92 = 1,732.62 : x
  2. Step 2: Convert to fraction form
    3,129.78/4,318.92 = 1,732.62/x
  3. Step 3: Cross multiply
    3,129.78x = 4,318.92 × 1,732.62
  4. Step 4: Simplify right side
    3,129.78x = 7,483,047.17
  5. Step 5: Solve for x
    x = 7,483,047.17/3,129.78
  6. Step 6: Final answer
    x = 2,390.92

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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.