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Finding the Fourth Proportional to 245.87, 339.00 and 212.61

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Solution

The fourth proportional to 245.87, 339.00 and 212.61 is: 293.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.87 : 339.00 = 212.61 : x
  2. Step 2: Convert to fraction form
    245.87/339.00 = 212.61/x
  3. Step 3: Cross multiply
    245.87x = 339.00 × 212.61
  4. Step 4: Simplify right side
    245.87x = 72,073.73
  5. Step 5: Solve for x
    x = 72,073.73/245.87
  6. Step 6: Final answer
    x = 293.14

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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.