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Finding the Fourth Proportional to 277.60, 418.88 and 266.88

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Solution

The fourth proportional to 277.60, 418.88 and 266.88 is: 402.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.60 : 418.88 = 266.88 : x
  2. Step 2: Convert to fraction form
    277.60/418.88 = 266.88/x
  3. Step 3: Cross multiply
    277.60x = 418.88 × 266.88
  4. Step 4: Simplify right side
    277.60x = 111,790.69
  5. Step 5: Solve for x
    x = 111,790.69/277.60
  6. Step 6: Final answer
    x = 402.70

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.