Home / 812,080.80-1,218,121.20-413,500.05

Finding the Fourth Proportional to 812,080.80, 1,218,121.20 and 413,500.05

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Solution

The fourth proportional to 812,080.80, 1,218,121.20 and 413,500.05 is: 620,250.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,080.80 : 1,218,121.20 = 413,500.05 : x
  2. Step 2: Convert to fraction form
    812,080.80/1,218,121.20 = 413,500.05/x
  3. Step 3: Cross multiply
    812,080.80x = 1,218,121.20 × 413,500.05
  4. Step 4: Simplify right side
    812,080.80x = 503,693,177,106.06
  5. Step 5: Solve for x
    x = 503,693,177,106.06/812,080.80
  6. Step 6: Final answer
    x = 620,250.08

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Double scale
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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.