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Finding the Fourth Proportional to 649, 896.34 and 428.92

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Solution

The fourth proportional to 649, 896.34 and 428.92 is: 592.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    649 : 896.34 = 428.92 : x
  2. Step 2: Convert to fraction form
    649/896.34 = 428.92/x
  3. Step 3: Cross multiply
    649x = 896.34 × 428.92
  4. Step 4: Simplify right side
    649x = 384,458.15
  5. Step 5: Solve for x
    x = 384,458.15/649
  6. Step 6: Final answer
    x = 592.39

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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.