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Finding the Fourth Proportional to 809,209.20, 1,213,813.80 and 557,266.80

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Solution

The fourth proportional to 809,209.20, 1,213,813.80 and 557,266.80 is: 835,900.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,209.20 : 1,213,813.80 = 557,266.80 : x
  2. Step 2: Convert to fraction form
    809,209.20/1,213,813.80 = 557,266.80/x
  3. Step 3: Cross multiply
    809,209.20x = 1,213,813.80 × 557,266.80
  4. Step 4: Simplify right side
    809,209.20x = 676,418,132,121.84
  5. Step 5: Solve for x
    x = 676,418,132,121.84/809,209.20
  6. Step 6: Final answer
    x = 835,900.20

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Double scale
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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.