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Finding the Fourth Proportional to 871,366.75, 1,202,490.90 and 489,393.56

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Solution

The fourth proportional to 871,366.75, 1,202,490.90 and 489,393.56 is: 675,365.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,366.75 : 1,202,490.90 = 489,393.56 : x
  2. Step 2: Convert to fraction form
    871,366.75/1,202,490.90 = 489,393.56/x
  3. Step 3: Cross multiply
    871,366.75x = 1,202,490.90 × 489,393.56
  4. Step 4: Simplify right side
    871,366.75x = 588,491,305,424.83
  5. Step 5: Solve for x
    x = 588,491,305,424.83/871,366.75
  6. Step 6: Final answer
    x = 675,365.81

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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.