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Finding the Fourth Proportional to 521.49, 719.79 and 324.88

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Solution

The fourth proportional to 521.49, 719.79 and 324.88 is: 448.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.49 : 719.79 = 324.88 : x
  2. Step 2: Convert to fraction form
    521.49/719.79 = 324.88/x
  3. Step 3: Cross multiply
    521.49x = 719.79 × 324.88
  4. Step 4: Simplify right side
    521.49x = 233,845.38
  5. Step 5: Solve for x
    x = 233,845.38/521.49
  6. Step 6: Final answer
    x = 448.42

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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.