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Finding the Fourth Proportional to 1,096.12, 1,644.36 and 479.80

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Solution

The fourth proportional to 1,096.12, 1,644.36 and 479.80 is: 719.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,096.12 : 1,644.36 = 479.80 : x
  2. Step 2: Convert to fraction form
    1,096.12/1,644.36 = 479.80/x
  3. Step 3: Cross multiply
    1,096.12x = 1,644.36 × 479.80
  4. Step 4: Simplify right side
    1,096.12x = 788,963.93
  5. Step 5: Solve for x
    x = 788,963.93/1,096.12
  6. Step 6: Final answer
    x = 719.78

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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.