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Finding the Fourth Proportional to 503,998.80, 755,998.20 and 427,891.20

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Solution

The fourth proportional to 503,998.80, 755,998.20 and 427,891.20 is: 641,836.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,998.80 : 755,998.20 = 427,891.20 : x
  2. Step 2: Convert to fraction form
    503,998.80/755,998.20 = 427,891.20/x
  3. Step 3: Cross multiply
    503,998.80x = 755,998.20 × 427,891.20
  4. Step 4: Simplify right side
    503,998.80x = 323,484,976,995.84
  5. Step 5: Solve for x
    x = 323,484,976,995.84/503,998.80
  6. Step 6: Final answer
    x = 641,836.80

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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.