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Finding the Fourth Proportional to 322.00, 483.19 and 139.39

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Solution

The fourth proportional to 322.00, 483.19 and 139.39 is: 209.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.00 : 483.19 = 139.39 : x
  2. Step 2: Convert to fraction form
    322.00/483.19 = 139.39/x
  3. Step 3: Cross multiply
    322.00x = 483.19 × 139.39
  4. Step 4: Simplify right side
    322.00x = 67,351.08
  5. Step 5: Solve for x
    x = 67,351.08/322.00
  6. Step 6: Final answer
    x = 209.17

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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.