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Finding the Fourth Proportional to 291.56, 402.35 and 160.55

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Solution

The fourth proportional to 291.56, 402.35 and 160.55 is: 221.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.56 : 402.35 = 160.55 : x
  2. Step 2: Convert to fraction form
    291.56/402.35 = 160.55/x
  3. Step 3: Cross multiply
    291.56x = 402.35 × 160.55
  4. Step 4: Simplify right side
    291.56x = 64,596.49
  5. Step 5: Solve for x
    x = 64,596.49/291.56
  6. Step 6: Final answer
    x = 221.55

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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.