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Finding the Fourth Proportional to 543,338.60, 815,007.90 and 409,494.20

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Solution

The fourth proportional to 543,338.60, 815,007.90 and 409,494.20 is: 614,241.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,338.60 : 815,007.90 = 409,494.20 : x
  2. Step 2: Convert to fraction form
    543,338.60/815,007.90 = 409,494.20/x
  3. Step 3: Cross multiply
    543,338.60x = 815,007.90 × 409,494.20
  4. Step 4: Simplify right side
    543,338.60x = 333,741,008,004.18
  5. Step 5: Solve for x
    x = 333,741,008,004.18/543,338.60
  6. Step 6: Final answer
    x = 614,241.30

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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.