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Finding the Fourth Proportional to 268.54, 403.08 and 153.20

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Solution

The fourth proportional to 268.54, 403.08 and 153.20 is: 229.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.54 : 403.08 = 153.20 : x
  2. Step 2: Convert to fraction form
    268.54/403.08 = 153.20/x
  3. Step 3: Cross multiply
    268.54x = 403.08 × 153.20
  4. Step 4: Simplify right side
    268.54x = 61,752.86
  5. Step 5: Solve for x
    x = 61,752.86/268.54
  6. Step 6: Final answer
    x = 229.96

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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.