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Finding the Fourth Proportional to 267.20, 368.82 and 156.72

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Solution

The fourth proportional to 267.20, 368.82 and 156.72 is: 216.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.20 : 368.82 = 156.72 : x
  2. Step 2: Convert to fraction form
    267.20/368.82 = 156.72/x
  3. Step 3: Cross multiply
    267.20x = 368.82 × 156.72
  4. Step 4: Simplify right side
    267.20x = 57,801.47
  5. Step 5: Solve for x
    x = 57,801.47/267.20
  6. Step 6: Final answer
    x = 216.32

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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.