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Finding the Fourth Proportional to 296.69, 409.48 and 288.89

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Solution

The fourth proportional to 296.69, 409.48 and 288.89 is: 398.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.69 : 409.48 = 288.89 : x
  2. Step 2: Convert to fraction form
    296.69/409.48 = 288.89/x
  3. Step 3: Cross multiply
    296.69x = 409.48 × 288.89
  4. Step 4: Simplify right side
    296.69x = 118,294.68
  5. Step 5: Solve for x
    x = 118,294.68/296.69
  6. Step 6: Final answer
    x = 398.71

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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.