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Finding the Fourth Proportional to 663,616.80, 995,425.20 and 308,512.80

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Solution

The fourth proportional to 663,616.80, 995,425.20 and 308,512.80 is: 462,769.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,616.80 : 995,425.20 = 308,512.80 : x
  2. Step 2: Convert to fraction form
    663,616.80/995,425.20 = 308,512.80/x
  3. Step 3: Cross multiply
    663,616.80x = 995,425.20 × 308,512.80
  4. Step 4: Simplify right side
    663,616.80x = 307,101,415,642.56
  5. Step 5: Solve for x
    x = 307,101,415,642.56/663,616.80
  6. Step 6: Final answer
    x = 462,769.20

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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.