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Finding the Fourth Proportional to 322.14, 483.45 and 139.67

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Solution

The fourth proportional to 322.14, 483.45 and 139.67 is: 209.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.14 : 483.45 = 139.67 : x
  2. Step 2: Convert to fraction form
    322.14/483.45 = 139.67/x
  3. Step 3: Cross multiply
    322.14x = 483.45 × 139.67
  4. Step 4: Simplify right side
    322.14x = 67,525.84
  5. Step 5: Solve for x
    x = 67,525.84/322.14
  6. Step 6: Final answer
    x = 209.61

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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.