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Finding the Fourth Proportional to 521.29, 719.53 and 344.38

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Solution

The fourth proportional to 521.29, 719.53 and 344.38 is: 475.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.29 : 719.53 = 344.38 : x
  2. Step 2: Convert to fraction form
    521.29/719.53 = 344.38/x
  3. Step 3: Cross multiply
    521.29x = 719.53 × 344.38
  4. Step 4: Simplify right side
    521.29x = 247,789.08
  5. Step 5: Solve for x
    x = 247,789.08/521.29
  6. Step 6: Final answer
    x = 475.34

Related Problems

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.