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Finding the Fourth Proportional to 318,643.70, 477,965.55 and 267,905.30

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Solution

The fourth proportional to 318,643.70, 477,965.55 and 267,905.30 is: 401,857.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,643.70 : 477,965.55 = 267,905.30 : x
  2. Step 2: Convert to fraction form
    318,643.70/477,965.55 = 267,905.30/x
  3. Step 3: Cross multiply
    318,643.70x = 477,965.55 × 267,905.30
  4. Step 4: Simplify right side
    318,643.70x = 128,049,504,062.42
  5. Step 5: Solve for x
    x = 128,049,504,062.42/318,643.70
  6. Step 6: Final answer
    x = 401,857.95

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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.