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Finding the Fourth Proportional to 200.92, 302.48 and 147.20

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Solution

The fourth proportional to 200.92, 302.48 and 147.20 is: 221.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.92 : 302.48 = 147.20 : x
  2. Step 2: Convert to fraction form
    200.92/302.48 = 147.20/x
  3. Step 3: Cross multiply
    200.92x = 302.48 × 147.20
  4. Step 4: Simplify right side
    200.92x = 44,525.06
  5. Step 5: Solve for x
    x = 44,525.06/200.92
  6. Step 6: Final answer
    x = 221.61

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.