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Finding the Fourth Proportional to 215.18, 296.95 and 126.65

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Solution

The fourth proportional to 215.18, 296.95 and 126.65 is: 174.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.18 : 296.95 = 126.65 : x
  2. Step 2: Convert to fraction form
    215.18/296.95 = 126.65/x
  3. Step 3: Cross multiply
    215.18x = 296.95 × 126.65
  4. Step 4: Simplify right side
    215.18x = 37,607.39
  5. Step 5: Solve for x
    x = 37,607.39/215.18
  6. Step 6: Final answer
    x = 174.77

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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.