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Finding the Fourth Proportional to 291.62, 401.61 and 265.66

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Solution

The fourth proportional to 291.62, 401.61 and 265.66 is: 365.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.62 : 401.61 = 265.66 : x
  2. Step 2: Convert to fraction form
    291.62/401.61 = 265.66/x
  3. Step 3: Cross multiply
    291.62x = 401.61 × 265.66
  4. Step 4: Simplify right side
    291.62x = 106,691.71
  5. Step 5: Solve for x
    x = 106,691.71/291.62
  6. Step 6: Final answer
    x = 365.86

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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.