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Finding the Fourth Proportional to 896.51, 1,344.90 and 319.25

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Solution

The fourth proportional to 896.51, 1,344.90 and 319.25 is: 478.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.51 : 1,344.90 = 319.25 : x
  2. Step 2: Convert to fraction form
    896.51/1,344.90 = 319.25/x
  3. Step 3: Cross multiply
    896.51x = 1,344.90 × 319.25
  4. Step 4: Simplify right side
    896.51x = 429,359.33
  5. Step 5: Solve for x
    x = 429,359.33/896.51
  6. Step 6: Final answer
    x = 478.92

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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.