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Finding the Fourth Proportional to 730.28, 1,095.73 and 319.21

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Solution

The fourth proportional to 730.28, 1,095.73 and 319.21 is: 478.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.28 : 1,095.73 = 319.21 : x
  2. Step 2: Convert to fraction form
    730.28/1,095.73 = 319.21/x
  3. Step 3: Cross multiply
    730.28x = 1,095.73 × 319.21
  4. Step 4: Simplify right side
    730.28x = 349,764.44
  5. Step 5: Solve for x
    x = 349,764.44/730.28
  6. Step 6: Final answer
    x = 478.94

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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.