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Finding the Fourth Proportional to 257.75, 386.45 and 184.63

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Solution

The fourth proportional to 257.75, 386.45 and 184.63 is: 276.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.75 : 386.45 = 184.63 : x
  2. Step 2: Convert to fraction form
    257.75/386.45 = 184.63/x
  3. Step 3: Cross multiply
    257.75x = 386.45 × 184.63
  4. Step 4: Simplify right side
    257.75x = 71,347.41
  5. Step 5: Solve for x
    x = 71,347.41/257.75
  6. Step 6: Final answer
    x = 276.81

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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.