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Finding the Fourth Proportional to 267.18, 368.64 and 155.16

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Solution

The fourth proportional to 267.18, 368.64 and 155.16 is: 214.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.18 : 368.64 = 155.16 : x
  2. Step 2: Convert to fraction form
    267.18/368.64 = 155.16/x
  3. Step 3: Cross multiply
    267.18x = 368.64 × 155.16
  4. Step 4: Simplify right side
    267.18x = 57,198.18
  5. Step 5: Solve for x
    x = 57,198.18/267.18
  6. Step 6: Final answer
    x = 214.08

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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.