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Finding the Fourth Proportional to 291.94, 402.84 and 160.92

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Solution

The fourth proportional to 291.94, 402.84 and 160.92 is: 222.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.94 : 402.84 = 160.92 : x
  2. Step 2: Convert to fraction form
    291.94/402.84 = 160.92/x
  3. Step 3: Cross multiply
    291.94x = 402.84 × 160.92
  4. Step 4: Simplify right side
    291.94x = 64,826.12
  5. Step 5: Solve for x
    x = 64,826.12/291.94
  6. Step 6: Final answer
    x = 222.05

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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.