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Finding the Fourth Proportional to 218.06, 300.94 and 130.79

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Solution

The fourth proportional to 218.06, 300.94 and 130.79 is: 180.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.06 : 300.94 = 130.79 : x
  2. Step 2: Convert to fraction form
    218.06/300.94 = 130.79/x
  3. Step 3: Cross multiply
    218.06x = 300.94 × 130.79
  4. Step 4: Simplify right side
    218.06x = 39,358.11
  5. Step 5: Solve for x
    x = 39,358.11/218.06
  6. Step 6: Final answer
    x = 180.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.