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Finding the Fourth Proportional to 649.37, 896.09 and 400.61

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Solution

The fourth proportional to 649.37, 896.09 and 400.61 is: 552.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.37 : 896.09 = 400.61 : x
  2. Step 2: Convert to fraction form
    649.37/896.09 = 400.61/x
  3. Step 3: Cross multiply
    649.37x = 896.09 × 400.61
  4. Step 4: Simplify right side
    649.37x = 358,982.85
  5. Step 5: Solve for x
    x = 358,982.85/649.37
  6. Step 6: Final answer
    x = 552.81

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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.