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Finding the Fourth Proportional to 218.40, 301.16 and 213.39

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Solution

The fourth proportional to 218.40, 301.16 and 213.39 is: 294.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.40 : 301.16 = 213.39 : x
  2. Step 2: Convert to fraction form
    218.40/301.16 = 213.39/x
  3. Step 3: Cross multiply
    218.40x = 301.16 × 213.39
  4. Step 4: Simplify right side
    218.40x = 64,263.47
  5. Step 5: Solve for x
    x = 64,263.47/218.40
  6. Step 6: Final answer
    x = 294.25

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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.