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Finding the Fourth Proportional to 911,193.60, 1,366,790.40 and 486,040.80

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Solution

The fourth proportional to 911,193.60, 1,366,790.40 and 486,040.80 is: 729,061.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,193.60 : 1,366,790.40 = 486,040.80 : x
  2. Step 2: Convert to fraction form
    911,193.60/1,366,790.40 = 486,040.80/x
  3. Step 3: Cross multiply
    911,193.60x = 1,366,790.40 × 486,040.80
  4. Step 4: Simplify right side
    911,193.60x = 664,315,899,448.32
  5. Step 5: Solve for x
    x = 664,315,899,448.32/911,193.60
  6. Step 6: Final answer
    x = 729,061.20

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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.