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Finding the Fourth Proportional to 258.76, 387.28 and 184.48

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Solution

The fourth proportional to 258.76, 387.28 and 184.48 is: 276.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.76 : 387.28 = 184.48 : x
  2. Step 2: Convert to fraction form
    258.76/387.28 = 184.48/x
  3. Step 3: Cross multiply
    258.76x = 387.28 × 184.48
  4. Step 4: Simplify right side
    258.76x = 71,445.41
  5. Step 5: Solve for x
    x = 71,445.41/258.76
  6. Step 6: Final answer
    x = 276.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.