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Finding the Fourth Proportional to 218.77, 301.74 and 151.50

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Solution

The fourth proportional to 218.77, 301.74 and 151.50 is: 208.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.77 : 301.74 = 151.50 : x
  2. Step 2: Convert to fraction form
    218.77/301.74 = 151.50/x
  3. Step 3: Cross multiply
    218.77x = 301.74 × 151.50
  4. Step 4: Simplify right side
    218.77x = 45,713.61
  5. Step 5: Solve for x
    x = 45,713.61/218.77
  6. Step 6: Final answer
    x = 208.96

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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.