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Finding the Fourth Proportional to 268.70, 370.55 and 178.80

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Solution

The fourth proportional to 268.70, 370.55 and 178.80 is: 246.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.70 : 370.55 = 178.80 : x
  2. Step 2: Convert to fraction form
    268.70/370.55 = 178.80/x
  3. Step 3: Cross multiply
    268.70x = 370.55 × 178.80
  4. Step 4: Simplify right side
    268.70x = 66,253.45
  5. Step 5: Solve for x
    x = 66,253.45/268.70
  6. Step 6: Final answer
    x = 246.57

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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.