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Finding the Fourth Proportional to 3,909.92, 5,395.20 and 2,294.96

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Solution

The fourth proportional to 3,909.92, 5,395.20 and 2,294.96 is: 3,166.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.92 : 5,395.20 = 2,294.96 : x
  2. Step 2: Convert to fraction form
    3,909.92/5,395.20 = 2,294.96/x
  3. Step 3: Cross multiply
    3,909.92x = 5,395.20 × 2,294.96
  4. Step 4: Simplify right side
    3,909.92x = 12,381,768.19
  5. Step 5: Solve for x
    x = 12,381,768.19/3,909.92
  6. Step 6: Final answer
    x = 3,166.76

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1.5x scale

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.