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Finding the Fourth Proportional to 215.43, 297.18 and 153.29

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Solution

The fourth proportional to 215.43, 297.18 and 153.29 is: 211.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.43 : 297.18 = 153.29 : x
  2. Step 2: Convert to fraction form
    215.43/297.18 = 153.29/x
  3. Step 3: Cross multiply
    215.43x = 297.18 × 153.29
  4. Step 4: Simplify right side
    215.43x = 45,553.24
  5. Step 5: Solve for x
    x = 45,553.24/215.43
  6. Step 6: Final answer
    x = 211.45

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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.