Home / 1,278,138.80-1,917,208.20-717,100.40

Finding the Fourth Proportional to 1,278,138.80, 1,917,208.20 and 717,100.40

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Solution

The fourth proportional to 1,278,138.80, 1,917,208.20 and 717,100.40 is: 1,075,650.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,138.80 : 1,917,208.20 = 717,100.40 : x
  2. Step 2: Convert to fraction form
    1,278,138.80/1,917,208.20 = 717,100.40/x
  3. Step 3: Cross multiply
    1,278,138.80x = 1,917,208.20 × 717,100.40
  4. Step 4: Simplify right side
    1,278,138.80x = 1,374,830,767,103.28
  5. Step 5: Solve for x
    x = 1,374,830,767,103.28/1,278,138.80
  6. Step 6: Final answer
    x = 1,075,650.60

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Similar ratio
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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.