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Finding the Fourth Proportional to 215.54, 297.43 and 141.72

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Solution

The fourth proportional to 215.54, 297.43 and 141.72 is: 195.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.54 : 297.43 = 141.72 : x
  2. Step 2: Convert to fraction form
    215.54/297.43 = 141.72/x
  3. Step 3: Cross multiply
    215.54x = 297.43 × 141.72
  4. Step 4: Simplify right side
    215.54x = 42,151.07
  5. Step 5: Solve for x
    x = 42,151.07/215.54
  6. Step 6: Final answer
    x = 195.56

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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.