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Finding the Fourth Proportional to 218.93, 328.35 and 103.33

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Solution

The fourth proportional to 218.93, 328.35 and 103.33 is: 154.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.93 : 328.35 = 103.33 : x
  2. Step 2: Convert to fraction form
    218.93/328.35 = 103.33/x
  3. Step 3: Cross multiply
    218.93x = 328.35 × 103.33
  4. Step 4: Simplify right side
    218.93x = 33,926.76
  5. Step 5: Solve for x
    x = 33,926.76/218.93
  6. Step 6: Final answer
    x = 154.97

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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.