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Finding the Fourth Proportional to 192.72, 266.04 and 149.28

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Solution

The fourth proportional to 192.72, 266.04 and 149.28 is: 206.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.72 : 266.04 = 149.28 : x
  2. Step 2: Convert to fraction form
    192.72/266.04 = 149.28/x
  3. Step 3: Cross multiply
    192.72x = 266.04 × 149.28
  4. Step 4: Simplify right side
    192.72x = 39,714.45
  5. Step 5: Solve for x
    x = 39,714.45/192.72
  6. Step 6: Final answer
    x = 206.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.