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Finding the Fourth Proportional to 223.20, 307.98 and 135.86

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Solution

The fourth proportional to 223.20, 307.98 and 135.86 is: 187.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.20 : 307.98 = 135.86 : x
  2. Step 2: Convert to fraction form
    223.20/307.98 = 135.86/x
  3. Step 3: Cross multiply
    223.20x = 307.98 × 135.86
  4. Step 4: Simplify right side
    223.20x = 41,840.62
  5. Step 5: Solve for x
    x = 41,840.62/223.20
  6. Step 6: Final answer
    x = 187.46

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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.