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Finding the Fourth Proportional to 217.64, 325.20 and 148.58

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Solution

The fourth proportional to 217.64, 325.20 and 148.58 is: 222.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.64 : 325.20 = 148.58 : x
  2. Step 2: Convert to fraction form
    217.64/325.20 = 148.58/x
  3. Step 3: Cross multiply
    217.64x = 325.20 × 148.58
  4. Step 4: Simplify right side
    217.64x = 48,318.22
  5. Step 5: Solve for x
    x = 48,318.22/217.64
  6. Step 6: Final answer
    x = 222.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.