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Finding the Fourth Proportional to 521.35, 719.15 and 396.96

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Solution

The fourth proportional to 521.35, 719.15 and 396.96 is: 547.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.35 : 719.15 = 396.96 : x
  2. Step 2: Convert to fraction form
    521.35/719.15 = 396.96/x
  3. Step 3: Cross multiply
    521.35x = 719.15 × 396.96
  4. Step 4: Simplify right side
    521.35x = 285,475.00
  5. Step 5: Solve for x
    x = 285,475.00/521.35
  6. Step 6: Final answer
    x = 547.57

Related Problems

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Double scale
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Similar ratio
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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.