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Finding the Fourth Proportional to 291.12, 401.73 and 160.12

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Solution

The fourth proportional to 291.12, 401.73 and 160.12 is: 220.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.12 : 401.73 = 160.12 : x
  2. Step 2: Convert to fraction form
    291.12/401.73 = 160.12/x
  3. Step 3: Cross multiply
    291.12x = 401.73 × 160.12
  4. Step 4: Simplify right side
    291.12x = 64,325.01
  5. Step 5: Solve for x
    x = 64,325.01/291.12
  6. Step 6: Final answer
    x = 220.96

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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.