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Finding the Fourth Proportional to 277.92, 415.65 and 212.17

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Solution

The fourth proportional to 277.92, 415.65 and 212.17 is: 317.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.92 : 415.65 = 212.17 : x
  2. Step 2: Convert to fraction form
    277.92/415.65 = 212.17/x
  3. Step 3: Cross multiply
    277.92x = 415.65 × 212.17
  4. Step 4: Simplify right side
    277.92x = 88,188.46
  5. Step 5: Solve for x
    x = 88,188.46/277.92
  6. Step 6: Final answer
    x = 317.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.