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Finding the Fourth Proportional to 896.30, 1,343.63 and 319.04

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Solution

The fourth proportional to 896.30, 1,343.63 and 319.04 is: 478.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.30 : 1,343.63 = 319.04 : x
  2. Step 2: Convert to fraction form
    896.30/1,343.63 = 319.04/x
  3. Step 3: Cross multiply
    896.30x = 1,343.63 × 319.04
  4. Step 4: Simplify right side
    896.30x = 428,665.79
  5. Step 5: Solve for x
    x = 428,665.79/896.30
  6. Step 6: Final answer
    x = 478.26

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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.