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Finding the Fourth Proportional to 485,672.57, 670,211.55 and 267,889.89

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Solution

The fourth proportional to 485,672.57, 670,211.55 and 267,889.89 is: 369,678.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,672.57 : 670,211.55 = 267,889.89 : x
  2. Step 2: Convert to fraction form
    485,672.57/670,211.55 = 267,889.89/x
  3. Step 3: Cross multiply
    485,672.57x = 670,211.55 × 267,889.89
  4. Step 4: Simplify right side
    485,672.57x = 179,542,900,919.52
  5. Step 5: Solve for x
    x = 179,542,900,919.52/485,672.57
  6. Step 6: Final answer
    x = 369,678.90

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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.