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Finding the Fourth Proportional to 265.32, 397.26 and 213.68

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Solution

The fourth proportional to 265.32, 397.26 and 213.68 is: 319.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.32 : 397.26 = 213.68 : x
  2. Step 2: Convert to fraction form
    265.32/397.26 = 213.68/x
  3. Step 3: Cross multiply
    265.32x = 397.26 × 213.68
  4. Step 4: Simplify right side
    265.32x = 84,884.53
  5. Step 5: Solve for x
    x = 84,884.53/265.32
  6. Step 6: Final answer
    x = 319.93

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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.