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Finding the Fourth Proportional to 290.76, 400.71 and 267.48

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Solution

The fourth proportional to 290.76, 400.71 and 267.48 is: 368.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.76 : 400.71 = 267.48 : x
  2. Step 2: Convert to fraction form
    290.76/400.71 = 267.48/x
  3. Step 3: Cross multiply
    290.76x = 400.71 × 267.48
  4. Step 4: Simplify right side
    290.76x = 107,181.91
  5. Step 5: Solve for x
    x = 107,181.91/290.76
  6. Step 6: Final answer
    x = 368.63

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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.