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Finding the Fourth Proportional to 382.65, 573.87 and 139.14

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Solution

The fourth proportional to 382.65, 573.87 and 139.14 is: 208.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.65 : 573.87 = 139.14 : x
  2. Step 2: Convert to fraction form
    382.65/573.87 = 139.14/x
  3. Step 3: Cross multiply
    382.65x = 573.87 × 139.14
  4. Step 4: Simplify right side
    382.65x = 79,848.27
  5. Step 5: Solve for x
    x = 79,848.27/382.65
  6. Step 6: Final answer
    x = 208.67

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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.