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Finding the Fourth Proportional to 2,191.60, 3,292.20 and 1,543.60

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Solution

The fourth proportional to 2,191.60, 3,292.20 and 1,543.60 is: 2,318.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.60 : 3,292.20 = 1,543.60 : x
  2. Step 2: Convert to fraction form
    2,191.60/3,292.20 = 1,543.60/x
  3. Step 3: Cross multiply
    2,191.60x = 3,292.20 × 1,543.60
  4. Step 4: Simplify right side
    2,191.60x = 5,081,839.92
  5. Step 5: Solve for x
    x = 5,081,839.92/2,191.60
  6. Step 6: Final answer
    x = 2,318.78

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1.5x scale

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.