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Finding the Fourth Proportional to 649.26, 896 and 354.56

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Solution

The fourth proportional to 649.26, 896 and 354.56 is: 489.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.26 : 896 = 354.56 : x
  2. Step 2: Convert to fraction form
    649.26/896 = 354.56/x
  3. Step 3: Cross multiply
    649.26x = 896 × 354.56
  4. Step 4: Simplify right side
    649.26x = 317,685.76
  5. Step 5: Solve for x
    x = 317,685.76/649.26
  6. Step 6: Final answer
    x = 489.30

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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.