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Finding the Fourth Proportional to 277.80, 383.49 and 261.18

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Solution

The fourth proportional to 277.80, 383.49 and 261.18 is: 360.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.80 : 383.49 = 261.18 : x
  2. Step 2: Convert to fraction form
    277.80/383.49 = 261.18/x
  3. Step 3: Cross multiply
    277.80x = 383.49 × 261.18
  4. Step 4: Simplify right side
    277.80x = 100,159.92
  5. Step 5: Solve for x
    x = 100,159.92/277.80
  6. Step 6: Final answer
    x = 360.55

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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.