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Finding the Fourth Proportional to 277.95, 383.79 and 215.67

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Solution

The fourth proportional to 277.95, 383.79 and 215.67 is: 297.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.95 : 383.79 = 215.67 : x
  2. Step 2: Convert to fraction form
    277.95/383.79 = 215.67/x
  3. Step 3: Cross multiply
    277.95x = 383.79 × 215.67
  4. Step 4: Simplify right side
    277.95x = 82,771.99
  5. Step 5: Solve for x
    x = 82,771.99/277.95
  6. Step 6: Final answer
    x = 297.79

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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.