Home / 840,955.20-1,261,432.80-485,786.40

Finding the Fourth Proportional to 840,955.20, 1,261,432.80 and 485,786.40

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Solution

The fourth proportional to 840,955.20, 1,261,432.80 and 485,786.40 is: 728,679.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,955.20 : 1,261,432.80 = 485,786.40 : x
  2. Step 2: Convert to fraction form
    840,955.20/1,261,432.80 = 485,786.40/x
  3. Step 3: Cross multiply
    840,955.20x = 1,261,432.80 × 485,786.40
  4. Step 4: Simplify right side
    840,955.20x = 612,786,898,753.92
  5. Step 5: Solve for x
    x = 612,786,898,753.92/840,955.20
  6. Step 6: Final answer
    x = 728,679.60

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Similar ratio
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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.