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Finding the Fourth Proportional to 215.12, 296.28 and 191.68

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Solution

The fourth proportional to 215.12, 296.28 and 191.68 is: 264.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.12 : 296.28 = 191.68 : x
  2. Step 2: Convert to fraction form
    215.12/296.28 = 191.68/x
  3. Step 3: Cross multiply
    215.12x = 296.28 × 191.68
  4. Step 4: Simplify right side
    215.12x = 56,790.95
  5. Step 5: Solve for x
    x = 56,790.95/215.12
  6. Step 6: Final answer
    x = 264.00

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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.