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Finding the Fourth Proportional to 285,418.20, 428,127.30 and 267,922.20

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Solution

The fourth proportional to 285,418.20, 428,127.30 and 267,922.20 is: 401,883.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,418.20 : 428,127.30 = 267,922.20 : x
  2. Step 2: Convert to fraction form
    285,418.20/428,127.30 = 267,922.20/x
  3. Step 3: Cross multiply
    285,418.20x = 428,127.30 × 267,922.20
  4. Step 4: Simplify right side
    285,418.20x = 114,704,808,096.06
  5. Step 5: Solve for x
    x = 114,704,808,096.06/285,418.20
  6. Step 6: Final answer
    x = 401,883.30

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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.