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Finding the Fourth Proportional to 296.75, 408.55 and 257.93

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Solution

The fourth proportional to 296.75, 408.55 and 257.93 is: 355.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.75 : 408.55 = 257.93 : x
  2. Step 2: Convert to fraction form
    296.75/408.55 = 257.93/x
  3. Step 3: Cross multiply
    296.75x = 408.55 × 257.93
  4. Step 4: Simplify right side
    296.75x = 105,373.97
  5. Step 5: Solve for x
    x = 105,373.97/296.75
  6. Step 6: Final answer
    x = 355.09

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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.