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Finding the Fourth Proportional to 485,882.80, 728,824.20 and 426,833.80

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Solution

The fourth proportional to 485,882.80, 728,824.20 and 426,833.80 is: 640,250.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,882.80 : 728,824.20 = 426,833.80 : x
  2. Step 2: Convert to fraction form
    485,882.80/728,824.20 = 426,833.80/x
  3. Step 3: Cross multiply
    485,882.80x = 728,824.20 × 426,833.80
  4. Step 4: Simplify right side
    485,882.80x = 311,086,802,817.96
  5. Step 5: Solve for x
    x = 311,086,802,817.96/485,882.80
  6. Step 6: Final answer
    x = 640,250.70

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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.