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Finding the Fourth Proportional to 821,474.40, 1,229,792.40 and 612,040.80

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Solution

The fourth proportional to 821,474.40, 1,229,792.40 and 612,040.80 is: 916,258.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,474.40 : 1,229,792.40 = 612,040.80 : x
  2. Step 2: Convert to fraction form
    821,474.40/1,229,792.40 = 612,040.80/x
  3. Step 3: Cross multiply
    821,474.40x = 1,229,792.40 × 612,040.80
  4. Step 4: Simplify right side
    821,474.40x = 752,683,124,329.92
  5. Step 5: Solve for x
    x = 752,683,124,329.92/821,474.40
  6. Step 6: Final answer
    x = 916,258.77

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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.