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Finding the Fourth Proportional to 649.71, 896.55 and 354.97

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Solution

The fourth proportional to 649.71, 896.55 and 354.97 is: 489.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.71 : 896.55 = 354.97 : x
  2. Step 2: Convert to fraction form
    649.71/896.55 = 354.97/x
  3. Step 3: Cross multiply
    649.71x = 896.55 × 354.97
  4. Step 4: Simplify right side
    649.71x = 318,248.35
  5. Step 5: Solve for x
    x = 318,248.35/649.71
  6. Step 6: Final answer
    x = 489.83

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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.