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Finding the Fourth Proportional to 215.12, 296.46 and 149.51

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Solution

The fourth proportional to 215.12, 296.46 and 149.51 is: 206.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.12 : 296.46 = 149.51 : x
  2. Step 2: Convert to fraction form
    215.12/296.46 = 149.51/x
  3. Step 3: Cross multiply
    215.12x = 296.46 × 149.51
  4. Step 4: Simplify right side
    215.12x = 44,324.48
  5. Step 5: Solve for x
    x = 44,324.48/215.12
  6. Step 6: Final answer
    x = 206.04

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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.