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Finding the Fourth Proportional to 218.98, 302.22 and 130.50

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Solution

The fourth proportional to 218.98, 302.22 and 130.50 is: 180.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.98 : 302.22 = 130.50 : x
  2. Step 2: Convert to fraction form
    218.98/302.22 = 130.50/x
  3. Step 3: Cross multiply
    218.98x = 302.22 × 130.50
  4. Step 4: Simplify right side
    218.98x = 39,439.06
  5. Step 5: Solve for x
    x = 39,439.06/218.98
  6. Step 6: Final answer
    x = 180.11

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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.