Home / 839,719.20-1,258,772.40-278,464.80

Finding the Fourth Proportional to 839,719.20, 1,258,772.40 and 278,464.80

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Solution

The fourth proportional to 839,719.20, 1,258,772.40 and 278,464.80 is: 417,429.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,719.20 : 1,258,772.40 = 278,464.80 : x
  2. Step 2: Convert to fraction form
    839,719.20/1,258,772.40 = 278,464.80/x
  3. Step 3: Cross multiply
    839,719.20x = 1,258,772.40 × 278,464.80
  4. Step 4: Simplify right side
    839,719.20x = 350,523,804,611.52
  5. Step 5: Solve for x
    x = 350,523,804,611.52/839,719.20
  6. Step 6: Final answer
    x = 417,429.78

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1.5x scale

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.