Home / 1,145,990.40-1,720,821.60-911,284.80

Finding the Fourth Proportional to 1,145,990.40, 1,720,821.60 and 911,284.80

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Solution

The fourth proportional to 1,145,990.40, 1,720,821.60 and 911,284.80 is: 1,368,387.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145,990.40 : 1,720,821.60 = 911,284.80 : x
  2. Step 2: Convert to fraction form
    1,145,990.40/1,720,821.60 = 911,284.80/x
  3. Step 3: Cross multiply
    1,145,990.40x = 1,720,821.60 × 911,284.80
  4. Step 4: Simplify right side
    1,145,990.40x = 1,568,158,567,591.68
  5. Step 5: Solve for x
    x = 1,568,158,567,591.68/1,145,990.40
  6. Step 6: Final answer
    x = 1,368,387.18

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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.