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Finding the Fourth Proportional to 428,850, 591,425.55 and 267,719.94

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Solution

The fourth proportional to 428,850, 591,425.55 and 267,719.94 is: 369,211.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,850 : 591,425.55 = 267,719.94 : x
  2. Step 2: Convert to fraction form
    428,850/591,425.55 = 267,719.94/x
  3. Step 3: Cross multiply
    428,850x = 591,425.55 × 267,719.94
  4. Step 4: Simplify right side
    428,850x = 158,336,412,760.47
  5. Step 5: Solve for x
    x = 158,336,412,760.47/428,850
  6. Step 6: Final answer
    x = 369,211.64

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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.