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Finding the Fourth Proportional to 371.68, 557.34 and 286

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Solution

The fourth proportional to 371.68, 557.34 and 286 is: 428.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.68 : 557.34 = 286 : x
  2. Step 2: Convert to fraction form
    371.68/557.34 = 286/x
  3. Step 3: Cross multiply
    371.68x = 557.34 × 286
  4. Step 4: Simplify right side
    371.68x = 159,399.24
  5. Step 5: Solve for x
    x = 159,399.24/371.68
  6. Step 6: Final answer
    x = 428.86

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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.