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Finding the Fourth Proportional to 414,947.40, 622,421.10 and 378,205.80

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Solution

The fourth proportional to 414,947.40, 622,421.10 and 378,205.80 is: 567,308.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,947.40 : 622,421.10 = 378,205.80 : x
  2. Step 2: Convert to fraction form
    414,947.40/622,421.10 = 378,205.80/x
  3. Step 3: Cross multiply
    414,947.40x = 622,421.10 × 378,205.80
  4. Step 4: Simplify right side
    414,947.40x = 235,403,270,062.38
  5. Step 5: Solve for x
    x = 235,403,270,062.38/414,947.40
  6. Step 6: Final answer
    x = 567,308.70

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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.