Home / 1,278,740.80-1,918,111.20-807,515.20

Finding the Fourth Proportional to 1,278,740.80, 1,918,111.20 and 807,515.20

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Solution

The fourth proportional to 1,278,740.80, 1,918,111.20 and 807,515.20 is: 1,211,272.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,740.80 : 1,918,111.20 = 807,515.20 : x
  2. Step 2: Convert to fraction form
    1,278,740.80/1,918,111.20 = 807,515.20/x
  3. Step 3: Cross multiply
    1,278,740.80x = 1,918,111.20 × 807,515.20
  4. Step 4: Simplify right side
    1,278,740.80x = 1,548,903,949,290.24
  5. Step 5: Solve for x
    x = 1,548,903,949,290.24/1,278,740.80
  6. Step 6: Final answer
    x = 1,211,272.80

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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.