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Finding the Fourth Proportional to 521,200.80, 781,801.20 and 271,850.40

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Solution

The fourth proportional to 521,200.80, 781,801.20 and 271,850.40 is: 407,775.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,200.80 : 781,801.20 = 271,850.40 : x
  2. Step 2: Convert to fraction form
    521,200.80/781,801.20 = 271,850.40/x
  3. Step 3: Cross multiply
    521,200.80x = 781,801.20 × 271,850.40
  4. Step 4: Simplify right side
    521,200.80x = 212,532,968,940.48
  5. Step 5: Solve for x
    x = 212,532,968,940.48/521,200.80
  6. Step 6: Final answer
    x = 407,775.60

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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.