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Finding the Fourth Proportional to 255.85, 383.90 and 101.89

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Solution

The fourth proportional to 255.85, 383.90 and 101.89 is: 152.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.85 : 383.90 = 101.89 : x
  2. Step 2: Convert to fraction form
    255.85/383.90 = 101.89/x
  3. Step 3: Cross multiply
    255.85x = 383.90 × 101.89
  4. Step 4: Simplify right side
    255.85x = 39,115.57
  5. Step 5: Solve for x
    x = 39,115.57/255.85
  6. Step 6: Final answer
    x = 152.88

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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.