Home / 3,129.85-4,695.36-1,155.99

Finding the Fourth Proportional to 3,129.85, 4,695.36 and 1,155.99

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Solution

The fourth proportional to 3,129.85, 4,695.36 and 1,155.99 is: 1,734.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.85 : 4,695.36 = 1,155.99 : x
  2. Step 2: Convert to fraction form
    3,129.85/4,695.36 = 1,155.99/x
  3. Step 3: Cross multiply
    3,129.85x = 4,695.36 × 1,155.99
  4. Step 4: Simplify right side
    3,129.85x = 5,427,789.21
  5. Step 5: Solve for x
    x = 5,427,789.21/3,129.85
  6. Step 6: Final answer
    x = 1,734.20

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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.