Home / 839,713.20-1,258,763.40-278,458.80

Finding the Fourth Proportional to 839,713.20, 1,258,763.40 and 278,458.80

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Solution

The fourth proportional to 839,713.20, 1,258,763.40 and 278,458.80 is: 417,420.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,713.20 : 1,258,763.40 = 278,458.80 : x
  2. Step 2: Convert to fraction form
    839,713.20/1,258,763.40 = 278,458.80/x
  3. Step 3: Cross multiply
    839,713.20x = 1,258,763.40 × 278,458.80
  4. Step 4: Simplify right side
    839,713.20x = 350,513,745,847.92
  5. Step 5: Solve for x
    x = 350,513,745,847.92/839,713.20
  6. Step 6: Final answer
    x = 417,420.79

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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.