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Finding the Fourth Proportional to 291.57, 401.49 and 274.14

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Solution

The fourth proportional to 291.57, 401.49 and 274.14 is: 377.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.57 : 401.49 = 274.14 : x
  2. Step 2: Convert to fraction form
    291.57/401.49 = 274.14/x
  3. Step 3: Cross multiply
    291.57x = 401.49 × 274.14
  4. Step 4: Simplify right side
    291.57x = 110,064.47
  5. Step 5: Solve for x
    x = 110,064.47/291.57
  6. Step 6: Final answer
    x = 377.49

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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.