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Finding the Fourth Proportional to 976.96, 1,464.42 and 327.16

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Solution

The fourth proportional to 976.96, 1,464.42 and 327.16 is: 490.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.96 : 1,464.42 = 327.16 : x
  2. Step 2: Convert to fraction form
    976.96/1,464.42 = 327.16/x
  3. Step 3: Cross multiply
    976.96x = 1,464.42 × 327.16
  4. Step 4: Simplify right side
    976.96x = 479,099.65
  5. Step 5: Solve for x
    x = 479,099.65/976.96
  6. Step 6: Final answer
    x = 490.40

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Double scale
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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.