Home / 1,278,391.87-1,918,049.12-791,507.50

Finding the Fourth Proportional to 1,278,391.87, 1,918,049.12 and 791,507.50

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Solution

The fourth proportional to 1,278,391.87, 1,918,049.12 and 791,507.50 is: 1,187,546.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,391.87 : 1,918,049.12 = 791,507.50 : x
  2. Step 2: Convert to fraction form
    1,278,391.87/1,918,049.12 = 791,507.50/x
  3. Step 3: Cross multiply
    1,278,391.87x = 1,918,049.12 × 791,507.50
  4. Step 4: Simplify right side
    1,278,391.87x = 1,518,150,258,063.89
  5. Step 5: Solve for x
    x = 1,518,150,258,063.89/1,278,391.87
  6. Step 6: Final answer
    x = 1,187,546.87

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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.