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Finding the Fourth Proportional to 285,512.10, 428,268.15 and 274,625.70

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Solution

The fourth proportional to 285,512.10, 428,268.15 and 274,625.70 is: 411,938.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,512.10 : 428,268.15 = 274,625.70 : x
  2. Step 2: Convert to fraction form
    285,512.10/428,268.15 = 274,625.70/x
  3. Step 3: Cross multiply
    285,512.10x = 428,268.15 × 274,625.70
  4. Step 4: Simplify right side
    285,512.10x = 117,613,440,481.46
  5. Step 5: Solve for x
    x = 117,613,440,481.46/285,512.10
  6. Step 6: Final answer
    x = 411,938.55

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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.