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Finding the Fourth Proportional to 296.17, 408.56 and 208.89

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Solution

The fourth proportional to 296.17, 408.56 and 208.89 is: 288.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.17 : 408.56 = 208.89 : x
  2. Step 2: Convert to fraction form
    296.17/408.56 = 208.89/x
  3. Step 3: Cross multiply
    296.17x = 408.56 × 208.89
  4. Step 4: Simplify right side
    296.17x = 85,344.10
  5. Step 5: Solve for x
    x = 85,344.10/296.17
  6. Step 6: Final answer
    x = 288.16

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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.