Home / 1,278,056.80-1,914,752.40-1,040,111.20

Finding the Fourth Proportional to 1,278,056.80, 1,914,752.40 and 1,040,111.20

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Solution

The fourth proportional to 1,278,056.80, 1,914,752.40 and 1,040,111.20 is: 1,558,268.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,056.80 : 1,914,752.40 = 1,040,111.20 : x
  2. Step 2: Convert to fraction form
    1,278,056.80/1,914,752.40 = 1,040,111.20/x
  3. Step 3: Cross multiply
    1,278,056.80x = 1,914,752.40 × 1,040,111.20
  4. Step 4: Simplify right side
    1,278,056.80x = 1,991,555,416,466.88
  5. Step 5: Solve for x
    x = 1,991,555,416,466.88/1,278,056.80
  6. Step 6: Final answer
    x = 1,558,268.32

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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.