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Finding the Fourth Proportional to 554.87, 831.82 and 212.63

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Solution

The fourth proportional to 554.87, 831.82 and 212.63 is: 318.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.87 : 831.82 = 212.63 : x
  2. Step 2: Convert to fraction form
    554.87/831.82 = 212.63/x
  3. Step 3: Cross multiply
    554.87x = 831.82 × 212.63
  4. Step 4: Simplify right side
    554.87x = 176,869.89
  5. Step 5: Solve for x
    x = 176,869.89/554.87
  6. Step 6: Final answer
    x = 318.76

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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.