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Finding the Fourth Proportional to 288.40, 397.20 and 267.52

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Solution

The fourth proportional to 288.40, 397.20 and 267.52 is: 368.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.40 : 397.20 = 267.52 : x
  2. Step 2: Convert to fraction form
    288.40/397.20 = 267.52/x
  3. Step 3: Cross multiply
    288.40x = 397.20 × 267.52
  4. Step 4: Simplify right side
    288.40x = 106,258.94
  5. Step 5: Solve for x
    x = 106,258.94/288.40
  6. Step 6: Final answer
    x = 368.44

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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.