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Finding the Fourth Proportional to 218.87, 302.10 and 135.93

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Solution

The fourth proportional to 218.87, 302.10 and 135.93 is: 187.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.87 : 302.10 = 135.93 : x
  2. Step 2: Convert to fraction form
    218.87/302.10 = 135.93/x
  3. Step 3: Cross multiply
    218.87x = 302.10 × 135.93
  4. Step 4: Simplify right side
    218.87x = 41,066.10
  5. Step 5: Solve for x
    x = 41,066.10/218.87
  6. Step 6: Final answer
    x = 187.63

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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.