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Finding the Fourth Proportional to 386.82, 580.15 and 152.54

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Solution

The fourth proportional to 386.82, 580.15 and 152.54 is: 228.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.82 : 580.15 = 152.54 : x
  2. Step 2: Convert to fraction form
    386.82/580.15 = 152.54/x
  3. Step 3: Cross multiply
    386.82x = 580.15 × 152.54
  4. Step 4: Simplify right side
    386.82x = 88,496.77
  5. Step 5: Solve for x
    x = 88,496.77/386.82
  6. Step 6: Final answer
    x = 228.78

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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.