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Finding the Fourth Proportional to 730.84, 1,096.20 and 319.86

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Solution

The fourth proportional to 730.84, 1,096.20 and 319.86 is: 479.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.84 : 1,096.20 = 319.86 : x
  2. Step 2: Convert to fraction form
    730.84/1,096.20 = 319.86/x
  3. Step 3: Cross multiply
    730.84x = 1,096.20 × 319.86
  4. Step 4: Simplify right side
    730.84x = 350,630.53
  5. Step 5: Solve for x
    x = 350,630.53/730.84
  6. Step 6: Final answer
    x = 479.76

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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.