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Finding the Fourth Proportional to 545,921.20, 818,881.80 and 280,200.70

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Solution

The fourth proportional to 545,921.20, 818,881.80 and 280,200.70 is: 420,301.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,921.20 : 818,881.80 = 280,200.70 : x
  2. Step 2: Convert to fraction form
    545,921.20/818,881.80 = 280,200.70/x
  3. Step 3: Cross multiply
    545,921.20x = 818,881.80 × 280,200.70
  4. Step 4: Simplify right side
    545,921.20x = 229,451,253,577.26
  5. Step 5: Solve for x
    x = 229,451,253,577.26/545,921.20
  6. Step 6: Final answer
    x = 420,301.05

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Similar ratio
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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.