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Finding the Fourth Proportional to 258.94, 391.35 and 254.46

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Solution

The fourth proportional to 258.94, 391.35 and 254.46 is: 384.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.94 : 391.35 = 254.46 : x
  2. Step 2: Convert to fraction form
    258.94/391.35 = 254.46/x
  3. Step 3: Cross multiply
    258.94x = 391.35 × 254.46
  4. Step 4: Simplify right side
    258.94x = 99,581.65
  5. Step 5: Solve for x
    x = 99,581.65/258.94
  6. Step 6: Final answer
    x = 384.57

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.