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Finding the Fourth Proportional to 649.48, 896.16 and 387.52

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Solution

The fourth proportional to 649.48, 896.16 and 387.52 is: 534.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.48 : 896.16 = 387.52 : x
  2. Step 2: Convert to fraction form
    649.48/896.16 = 387.52/x
  3. Step 3: Cross multiply
    649.48x = 896.16 × 387.52
  4. Step 4: Simplify right side
    649.48x = 347,279.92
  5. Step 5: Solve for x
    x = 347,279.92/649.48
  6. Step 6: Final answer
    x = 534.70

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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.