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Finding the Fourth Proportional to 485,687.72, 670,224.70 and 267,934.61

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Solution

The fourth proportional to 485,687.72, 670,224.70 and 267,934.61 is: 369,736.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,687.72 : 670,224.70 = 267,934.61 : x
  2. Step 2: Convert to fraction form
    485,687.72/670,224.70 = 267,934.61/x
  3. Step 3: Cross multiply
    485,687.72x = 670,224.70 × 267,934.61
  4. Step 4: Simplify right side
    485,687.72x = 179,576,393,606.87
  5. Step 5: Solve for x
    x = 179,576,393,606.87/485,687.72
  6. Step 6: Final answer
    x = 369,736.33

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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.