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Finding the Fourth Proportional to 267.35, 368.91 and 156.79

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Solution

The fourth proportional to 267.35, 368.91 and 156.79 is: 216.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.35 : 368.91 = 156.79 : x
  2. Step 2: Convert to fraction form
    267.35/368.91 = 156.79/x
  3. Step 3: Cross multiply
    267.35x = 368.91 × 156.79
  4. Step 4: Simplify right side
    267.35x = 57,841.40
  5. Step 5: Solve for x
    x = 57,841.40/267.35
  6. Step 6: Final answer
    x = 216.35

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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.