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Finding the Fourth Proportional to 255.42, 382.90 and 101.45

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Solution

The fourth proportional to 255.42, 382.90 and 101.45 is: 152.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.42 : 382.90 = 101.45 : x
  2. Step 2: Convert to fraction form
    255.42/382.90 = 101.45/x
  3. Step 3: Cross multiply
    255.42x = 382.90 × 101.45
  4. Step 4: Simplify right side
    255.42x = 38,845.08
  5. Step 5: Solve for x
    x = 38,845.08/255.42
  6. Step 6: Final answer
    x = 152.09

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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.