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Finding the Fourth Proportional to 255.80, 383.64 and 101.72

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Solution

The fourth proportional to 255.80, 383.64 and 101.72 is: 152.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.80 : 383.64 = 101.72 : x
  2. Step 2: Convert to fraction form
    255.80/383.64 = 101.72/x
  3. Step 3: Cross multiply
    255.80x = 383.64 × 101.72
  4. Step 4: Simplify right side
    255.80x = 39,023.86
  5. Step 5: Solve for x
    x = 39,023.86/255.80
  6. Step 6: Final answer
    x = 152.56

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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.