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Finding the Fourth Proportional to 268.36, 402.33 and 103.74

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Solution

The fourth proportional to 268.36, 402.33 and 103.74 is: 155.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.36 : 402.33 = 103.74 : x
  2. Step 2: Convert to fraction form
    268.36/402.33 = 103.74/x
  3. Step 3: Cross multiply
    268.36x = 402.33 × 103.74
  4. Step 4: Simplify right side
    268.36x = 41,737.71
  5. Step 5: Solve for x
    x = 41,737.71/268.36
  6. Step 6: Final answer
    x = 155.53

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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.