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Finding the Fourth Proportional to 218.01, 300.87 and 124.79

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Solution

The fourth proportional to 218.01, 300.87 and 124.79 is: 172.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.01 : 300.87 = 124.79 : x
  2. Step 2: Convert to fraction form
    218.01/300.87 = 124.79/x
  3. Step 3: Cross multiply
    218.01x = 300.87 × 124.79
  4. Step 4: Simplify right side
    218.01x = 37,544.53
  5. Step 5: Solve for x
    x = 37,544.53/218.01
  6. Step 6: Final answer
    x = 172.21

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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.