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Finding the Fourth Proportional to 896.35, 1,344.38 and 479.61

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Solution

The fourth proportional to 896.35, 1,344.38 and 479.61 is: 719.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.35 : 1,344.38 = 479.61 : x
  2. Step 2: Convert to fraction form
    896.35/1,344.38 = 479.61/x
  3. Step 3: Cross multiply
    896.35x = 1,344.38 × 479.61
  4. Step 4: Simplify right side
    896.35x = 644,778.09
  5. Step 5: Solve for x
    x = 644,778.09/896.35
  6. Step 6: Final answer
    x = 719.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.