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Finding the Fourth Proportional to 255.96, 384.13 and 187.66

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Solution

The fourth proportional to 255.96, 384.13 and 187.66 is: 281.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.96 : 384.13 = 187.66 : x
  2. Step 2: Convert to fraction form
    255.96/384.13 = 187.66/x
  3. Step 3: Cross multiply
    255.96x = 384.13 × 187.66
  4. Step 4: Simplify right side
    255.96x = 72,085.84
  5. Step 5: Solve for x
    x = 72,085.84/255.96
  6. Step 6: Final answer
    x = 281.63

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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.