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Finding the Fourth Proportional to 380.33, 570.48 and 136.71

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Solution

The fourth proportional to 380.33, 570.48 and 136.71 is: 205.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.33 : 570.48 = 136.71 : x
  2. Step 2: Convert to fraction form
    380.33/570.48 = 136.71/x
  3. Step 3: Cross multiply
    380.33x = 570.48 × 136.71
  4. Step 4: Simplify right side
    380.33x = 77,990.32
  5. Step 5: Solve for x
    x = 77,990.32/380.33
  6. Step 6: Final answer
    x = 205.06

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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.