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Finding the Fourth Proportional to 215.25, 322.35 and 174.75

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Solution

The fourth proportional to 215.25, 322.35 and 174.75 is: 261.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.25 : 322.35 = 174.75 : x
  2. Step 2: Convert to fraction form
    215.25/322.35 = 174.75/x
  3. Step 3: Cross multiply
    215.25x = 322.35 × 174.75
  4. Step 4: Simplify right side
    215.25x = 56,330.66
  5. Step 5: Solve for x
    x = 56,330.66/215.25
  6. Step 6: Final answer
    x = 261.70

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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.