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Finding the Fourth Proportional to 223.19, 307.94 and 135.80

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Solution

The fourth proportional to 223.19, 307.94 and 135.80 is: 187.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.19 : 307.94 = 135.80 : x
  2. Step 2: Convert to fraction form
    223.19/307.94 = 135.80/x
  3. Step 3: Cross multiply
    223.19x = 307.94 × 135.80
  4. Step 4: Simplify right side
    223.19x = 41,816.03
  5. Step 5: Solve for x
    x = 41,816.03/223.19
  6. Step 6: Final answer
    x = 187.36

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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.