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Finding the Fourth Proportional to 521.20, 719.06 and 324.54

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Solution

The fourth proportional to 521.20, 719.06 and 324.54 is: 447.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.20 : 719.06 = 324.54 : x
  2. Step 2: Convert to fraction form
    521.20/719.06 = 324.54/x
  3. Step 3: Cross multiply
    521.20x = 719.06 × 324.54
  4. Step 4: Simplify right side
    521.20x = 233,363.73
  5. Step 5: Solve for x
    x = 233,363.73/521.20
  6. Step 6: Final answer
    x = 447.74

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.