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Finding the Fourth Proportional to 485,678.43, 670,244.49 and 267,912.09

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Solution

The fourth proportional to 485,678.43, 670,244.49 and 267,912.09 is: 369,723.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,678.43 : 670,244.49 = 267,912.09 : x
  2. Step 2: Convert to fraction form
    485,678.43/670,244.49 = 267,912.09/x
  3. Step 3: Cross multiply
    485,678.43x = 670,244.49 × 267,912.09
  4. Step 4: Simplify right side
    485,678.43x = 179,566,602,126.88
  5. Step 5: Solve for x
    x = 179,566,602,126.88/485,678.43
  6. Step 6: Final answer
    x = 369,723.24

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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.