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Finding the Fourth Proportional to 215.21, 297.03 and 148.97

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Solution

The fourth proportional to 215.21, 297.03 and 148.97 is: 205.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.21 : 297.03 = 148.97 : x
  2. Step 2: Convert to fraction form
    215.21/297.03 = 148.97/x
  3. Step 3: Cross multiply
    215.21x = 297.03 × 148.97
  4. Step 4: Simplify right side
    215.21x = 44,247.07
  5. Step 5: Solve for x
    x = 44,247.07/215.21
  6. Step 6: Final answer
    x = 205.60

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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.