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Finding the Fourth Proportional to 896.57, 1,344.63 and 319.45

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Solution

The fourth proportional to 896.57, 1,344.63 and 319.45 is: 479.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.57 : 1,344.63 = 319.45 : x
  2. Step 2: Convert to fraction form
    896.57/1,344.63 = 319.45/x
  3. Step 3: Cross multiply
    896.57x = 1,344.63 × 319.45
  4. Step 4: Simplify right side
    896.57x = 429,542.05
  5. Step 5: Solve for x
    x = 429,542.05/896.57
  6. Step 6: Final answer
    x = 479.09

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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.