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Finding the Fourth Proportional to 649.50, 896.31 and 354.75

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Solution

The fourth proportional to 649.50, 896.31 and 354.75 is: 489.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.50 : 896.31 = 354.75 : x
  2. Step 2: Convert to fraction form
    649.50/896.31 = 354.75/x
  3. Step 3: Cross multiply
    649.50x = 896.31 × 354.75
  4. Step 4: Simplify right side
    649.50x = 317,965.97
  5. Step 5: Solve for x
    x = 317,965.97/649.50
  6. Step 6: Final answer
    x = 489.56

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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.