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Finding the Fourth Proportional to 976.61, 1,464.56 and 327.19

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Solution

The fourth proportional to 976.61, 1,464.56 and 327.19 is: 490.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.61 : 1,464.56 = 327.19 : x
  2. Step 2: Convert to fraction form
    976.61/1,464.56 = 327.19/x
  3. Step 3: Cross multiply
    976.61x = 1,464.56 × 327.19
  4. Step 4: Simplify right side
    976.61x = 479,187.75
  5. Step 5: Solve for x
    x = 479,187.75/976.61
  6. Step 6: Final answer
    x = 490.67

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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.