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Finding the Fourth Proportional to 296.19, 408.78 and 238.14

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Solution

The fourth proportional to 296.19, 408.78 and 238.14 is: 328.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.19 : 408.78 = 238.14 : x
  2. Step 2: Convert to fraction form
    296.19/408.78 = 238.14/x
  3. Step 3: Cross multiply
    296.19x = 408.78 × 238.14
  4. Step 4: Simplify right side
    296.19x = 97,346.87
  5. Step 5: Solve for x
    x = 97,346.87/296.19
  6. Step 6: Final answer
    x = 328.66

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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.