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Finding the Fourth Proportional to 647,247.81, 970,879.97 and 247,912.55

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Solution

The fourth proportional to 647,247.81, 970,879.97 and 247,912.55 is: 371,871.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,247.81 : 970,879.97 = 247,912.55 : x
  2. Step 2: Convert to fraction form
    647,247.81/970,879.97 = 247,912.55/x
  3. Step 3: Cross multiply
    647,247.81x = 970,879.97 × 247,912.55
  4. Step 4: Simplify right side
    647,247.81x = 240,693,328,512.81
  5. Step 5: Solve for x
    x = 240,693,328,512.81/647,247.81
  6. Step 6: Final answer
    x = 371,871.98

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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.