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Finding the Fourth Proportional to 979,404.80, 1,469,107.20 and 820,774.40

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Solution

The fourth proportional to 979,404.80, 1,469,107.20 and 820,774.40 is: 1,231,161.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,404.80 : 1,469,107.20 = 820,774.40 : x
  2. Step 2: Convert to fraction form
    979,404.80/1,469,107.20 = 820,774.40/x
  3. Step 3: Cross multiply
    979,404.80x = 1,469,107.20 × 820,774.40
  4. Step 4: Simplify right side
    979,404.80x = 1,205,805,580,615.68
  5. Step 5: Solve for x
    x = 1,205,805,580,615.68/979,404.80
  6. Step 6: Final answer
    x = 1,231,161.60

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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.