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Finding the Fourth Proportional to 543,617.20, 815,425.80 and 169,640.20

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Solution

The fourth proportional to 543,617.20, 815,425.80 and 169,640.20 is: 254,460.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,617.20 : 815,425.80 = 169,640.20 : x
  2. Step 2: Convert to fraction form
    543,617.20/815,425.80 = 169,640.20/x
  3. Step 3: Cross multiply
    543,617.20x = 815,425.80 × 169,640.20
  4. Step 4: Simplify right side
    543,617.20x = 138,328,995,797.16
  5. Step 5: Solve for x
    x = 138,328,995,797.16/543,617.20
  6. Step 6: Final answer
    x = 254,460.30

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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.