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Finding the Fourth Proportional to 254.19, 381.30 and 100.19

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Solution

The fourth proportional to 254.19, 381.30 and 100.19 is: 150.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.19 : 381.30 = 100.19 : x
  2. Step 2: Convert to fraction form
    254.19/381.30 = 100.19/x
  3. Step 3: Cross multiply
    254.19x = 381.30 × 100.19
  4. Step 4: Simplify right side
    254.19x = 38,202.45
  5. Step 5: Solve for x
    x = 38,202.45/254.19
  6. Step 6: Final answer
    x = 150.29

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Double scale
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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.