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Finding the Fourth Proportional to 348.71, 521.99 and 286.44

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Solution

The fourth proportional to 348.71, 521.99 and 286.44 is: 428.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.71 : 521.99 = 286.44 : x
  2. Step 2: Convert to fraction form
    348.71/521.99 = 286.44/x
  3. Step 3: Cross multiply
    348.71x = 521.99 × 286.44
  4. Step 4: Simplify right side
    348.71x = 149,518.11
  5. Step 5: Solve for x
    x = 149,518.11/348.71
  6. Step 6: Final answer
    x = 428.78

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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.