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Finding the Fourth Proportional to 277.70, 388.30 and 277.70

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Solution

The fourth proportional to 277.70, 388.30 and 277.70 is: 388.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.70 : 388.30 = 277.70 : x
  2. Step 2: Convert to fraction form
    277.70/388.30 = 277.70/x
  3. Step 3: Cross multiply
    277.70x = 388.30 × 277.70
  4. Step 4: Simplify right side
    277.70x = 107,830.91
  5. Step 5: Solve for x
    x = 107,830.91/277.70
  6. Step 6: Final answer
    x = 388.30

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.