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Finding the Fourth Proportional to 380.66, 570.53 and 163.78

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Solution

The fourth proportional to 380.66, 570.53 and 163.78 is: 245.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.66 : 570.53 = 163.78 : x
  2. Step 2: Convert to fraction form
    380.66/570.53 = 163.78/x
  3. Step 3: Cross multiply
    380.66x = 570.53 × 163.78
  4. Step 4: Simplify right side
    380.66x = 93,442.53
  5. Step 5: Solve for x
    x = 93,442.53/380.66
  6. Step 6: Final answer
    x = 245.48

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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.