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Finding the Fourth Proportional to 404,631.80, 606,947.70 and 278,660.60

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Solution

The fourth proportional to 404,631.80, 606,947.70 and 278,660.60 is: 417,990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,631.80 : 606,947.70 = 278,660.60 : x
  2. Step 2: Convert to fraction form
    404,631.80/606,947.70 = 278,660.60/x
  3. Step 3: Cross multiply
    404,631.80x = 606,947.70 × 278,660.60
  4. Step 4: Simplify right side
    404,631.80x = 169,132,410,250.62
  5. Step 5: Solve for x
    x = 169,132,410,250.62/404,631.80
  6. Step 6: Final answer
    x = 417,990.90

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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.