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Finding the Fourth Proportional to 649.49, 896.27 and 387.52

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Solution

The fourth proportional to 649.49, 896.27 and 387.52 is: 534.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.49 : 896.27 = 387.52 : x
  2. Step 2: Convert to fraction form
    649.49/896.27 = 387.52/x
  3. Step 3: Cross multiply
    649.49x = 896.27 × 387.52
  4. Step 4: Simplify right side
    649.49x = 347,318.37
  5. Step 5: Solve for x
    x = 347,318.37/649.49
  6. Step 6: Final answer
    x = 534.76

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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.