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Finding the Fourth Proportional to 188.31, 259.88 and 160.67

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Solution

The fourth proportional to 188.31, 259.88 and 160.67 is: 221.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.31 : 259.88 = 160.67 : x
  2. Step 2: Convert to fraction form
    188.31/259.88 = 160.67/x
  3. Step 3: Cross multiply
    188.31x = 259.88 × 160.67
  4. Step 4: Simplify right side
    188.31x = 41,752.82
  5. Step 5: Solve for x
    x = 41,752.82/188.31
  6. Step 6: Final answer
    x = 221.72

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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.