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Finding the Fourth Proportional to 268.39, 402.63 and 131.35

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Solution

The fourth proportional to 268.39, 402.63 and 131.35 is: 197.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.39 : 402.63 = 131.35 : x
  2. Step 2: Convert to fraction form
    268.39/402.63 = 131.35/x
  3. Step 3: Cross multiply
    268.39x = 402.63 × 131.35
  4. Step 4: Simplify right side
    268.39x = 52,885.45
  5. Step 5: Solve for x
    x = 52,885.45/268.39
  6. Step 6: Final answer
    x = 197.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.