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Finding the Fourth Proportional to 215.12, 322.22 and 146.66

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Solution

The fourth proportional to 215.12, 322.22 and 146.66 is: 219.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.12 : 322.22 = 146.66 : x
  2. Step 2: Convert to fraction form
    215.12/322.22 = 146.66/x
  3. Step 3: Cross multiply
    215.12x = 322.22 × 146.66
  4. Step 4: Simplify right side
    215.12x = 47,256.79
  5. Step 5: Solve for x
    x = 47,256.79/215.12
  6. Step 6: Final answer
    x = 219.68

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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.