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Finding the Fourth Proportional to 277.85, 383.23 and 215.48

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Solution

The fourth proportional to 277.85, 383.23 and 215.48 is: 297.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.85 : 383.23 = 215.48 : x
  2. Step 2: Convert to fraction form
    277.85/383.23 = 215.48/x
  3. Step 3: Cross multiply
    277.85x = 383.23 × 215.48
  4. Step 4: Simplify right side
    277.85x = 82,578.40
  5. Step 5: Solve for x
    x = 82,578.40/277.85
  6. Step 6: Final answer
    x = 297.20

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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.