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Finding the Fourth Proportional to 277.70, 415.02 and 255.80

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Solution

The fourth proportional to 277.70, 415.02 and 255.80 is: 382.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.70 : 415.02 = 255.80 : x
  2. Step 2: Convert to fraction form
    277.70/415.02 = 255.80/x
  3. Step 3: Cross multiply
    277.70x = 415.02 × 255.80
  4. Step 4: Simplify right side
    277.70x = 106,162.19
  5. Step 5: Solve for x
    x = 106,162.19/277.70
  6. Step 6: Final answer
    x = 382.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.