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Finding the Fourth Proportional to 553,781.80, 764,187.78 and 327,500.20

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Solution

The fourth proportional to 553,781.80, 764,187.78 and 327,500.20 is: 451,931.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,781.80 : 764,187.78 = 327,500.20 : x
  2. Step 2: Convert to fraction form
    553,781.80/764,187.78 = 327,500.20/x
  3. Step 3: Cross multiply
    553,781.80x = 764,187.78 × 327,500.20
  4. Step 4: Simplify right side
    553,781.80x = 250,271,650,787.56
  5. Step 5: Solve for x
    x = 250,271,650,787.56/553,781.80
  6. Step 6: Final answer
    x = 451,931.88

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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.