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Finding the Fourth Proportional to 291.37, 402.12 and 167.07

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Solution

The fourth proportional to 291.37, 402.12 and 167.07 is: 230.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.37 : 402.12 = 167.07 : x
  2. Step 2: Convert to fraction form
    291.37/402.12 = 167.07/x
  3. Step 3: Cross multiply
    291.37x = 402.12 × 167.07
  4. Step 4: Simplify right side
    291.37x = 67,182.19
  5. Step 5: Solve for x
    x = 67,182.19/291.37
  6. Step 6: Final answer
    x = 230.57

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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.