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Finding the Fourth Proportional to 221.42, 332.40 and 130.16

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Solution

The fourth proportional to 221.42, 332.40 and 130.16 is: 195.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.42 : 332.40 = 130.16 : x
  2. Step 2: Convert to fraction form
    221.42/332.40 = 130.16/x
  3. Step 3: Cross multiply
    221.42x = 332.40 × 130.16
  4. Step 4: Simplify right side
    221.42x = 43,265.18
  5. Step 5: Solve for x
    x = 43,265.18/221.42
  6. Step 6: Final answer
    x = 195.40

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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.