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Finding the Fourth Proportional to 649.66, 896.30 and 397.48

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Solution

The fourth proportional to 649.66, 896.30 and 397.48 is: 548.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.66 : 896.30 = 397.48 : x
  2. Step 2: Convert to fraction form
    649.66/896.30 = 397.48/x
  3. Step 3: Cross multiply
    649.66x = 896.30 × 397.48
  4. Step 4: Simplify right side
    649.66x = 356,261.32
  5. Step 5: Solve for x
    x = 356,261.32/649.66
  6. Step 6: Final answer
    x = 548.38

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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.