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Finding the Fourth Proportional to 268.94, 402.50 and 188.15

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Solution

The fourth proportional to 268.94, 402.50 and 188.15 is: 281.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.94 : 402.50 = 188.15 : x
  2. Step 2: Convert to fraction form
    268.94/402.50 = 188.15/x
  3. Step 3: Cross multiply
    268.94x = 402.50 × 188.15
  4. Step 4: Simplify right side
    268.94x = 75,728.83
  5. Step 5: Solve for x
    x = 75,728.83/268.94
  6. Step 6: Final answer
    x = 281.58

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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.