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Finding the Fourth Proportional to 414,482.80, 621,724.20 and 324,281.20

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Solution

The fourth proportional to 414,482.80, 621,724.20 and 324,281.20 is: 486,421.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,482.80 : 621,724.20 = 324,281.20 : x
  2. Step 2: Convert to fraction form
    414,482.80/621,724.20 = 324,281.20/x
  3. Step 3: Cross multiply
    414,482.80x = 621,724.20 × 324,281.20
  4. Step 4: Simplify right side
    414,482.80x = 201,613,469,645.04
  5. Step 5: Solve for x
    x = 201,613,469,645.04/414,482.80
  6. Step 6: Final answer
    x = 486,421.80

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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.