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Finding the Fourth Proportional to 871,371.76, 1,202,497.80 and 489,398.57

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Solution

The fourth proportional to 871,371.76, 1,202,497.80 and 489,398.57 is: 675,372.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,371.76 : 1,202,497.80 = 489,398.57 : x
  2. Step 2: Convert to fraction form
    871,371.76/1,202,497.80 = 489,398.57/x
  3. Step 3: Cross multiply
    871,371.76x = 1,202,497.80 × 489,398.57
  4. Step 4: Simplify right side
    871,371.76x = 588,500,703,748.15
  5. Step 5: Solve for x
    x = 588,500,703,748.15/871,371.76
  6. Step 6: Final answer
    x = 675,372.71

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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.