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Finding the Fourth Proportional to 827,447.40, 1,241,171.10 and 266,481.90

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Solution

The fourth proportional to 827,447.40, 1,241,171.10 and 266,481.90 is: 399,722.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,447.40 : 1,241,171.10 = 266,481.90 : x
  2. Step 2: Convert to fraction form
    827,447.40/1,241,171.10 = 266,481.90/x
  3. Step 3: Cross multiply
    827,447.40x = 1,241,171.10 × 266,481.90
  4. Step 4: Simplify right side
    827,447.40x = 330,749,632,953.09
  5. Step 5: Solve for x
    x = 330,749,632,953.09/827,447.40
  6. Step 6: Final answer
    x = 399,722.85

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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.