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Finding the Fourth Proportional to 215.95, 324.06 and 147.64

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Solution

The fourth proportional to 215.95, 324.06 and 147.64 is: 221.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.95 : 324.06 = 147.64 : x
  2. Step 2: Convert to fraction form
    215.95/324.06 = 147.64/x
  3. Step 3: Cross multiply
    215.95x = 324.06 × 147.64
  4. Step 4: Simplify right side
    215.95x = 47,844.22
  5. Step 5: Solve for x
    x = 47,844.22/215.95
  6. Step 6: Final answer
    x = 221.55

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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.