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Finding the Fourth Proportional to 218.79, 301.93 and 125.53

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Solution

The fourth proportional to 218.79, 301.93 and 125.53 is: 173.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.79 : 301.93 = 125.53 : x
  2. Step 2: Convert to fraction form
    218.79/301.93 = 125.53/x
  3. Step 3: Cross multiply
    218.79x = 301.93 × 125.53
  4. Step 4: Simplify right side
    218.79x = 37,900.20
  5. Step 5: Solve for x
    x = 37,900.20/218.79
  6. Step 6: Final answer
    x = 173.23

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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.