Home / 3,129.50-4,318.52-1,712.90

Finding the Fourth Proportional to 3,129.50, 4,318.52 and 1,712.90

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Solution

The fourth proportional to 3,129.50, 4,318.52 and 1,712.90 is: 2,363.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.50 : 4,318.52 = 1,712.90 : x
  2. Step 2: Convert to fraction form
    3,129.50/4,318.52 = 1,712.90/x
  3. Step 3: Cross multiply
    3,129.50x = 4,318.52 × 1,712.90
  4. Step 4: Simplify right side
    3,129.50x = 7,397,184.34
  5. Step 5: Solve for x
    x = 7,397,184.34/3,129.50
  6. Step 6: Final answer
    x = 2,363.70

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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.