Home / 828,867.28-1,240,626.84-428,958.40

Finding the Fourth Proportional to 828,867.28, 1,240,626.84 and 428,958.40

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Solution

The fourth proportional to 828,867.28, 1,240,626.84 and 428,958.40 is: 642,053.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,867.28 : 1,240,626.84 = 428,958.40 : x
  2. Step 2: Convert to fraction form
    828,867.28/1,240,626.84 = 428,958.40/x
  3. Step 3: Cross multiply
    828,867.28x = 1,240,626.84 × 428,958.40
  4. Step 4: Simplify right side
    828,867.28x = 532,177,304,283.46
  5. Step 5: Solve for x
    x = 532,177,304,283.46/828,867.28
  6. Step 6: Final answer
    x = 642,053.70

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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.