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Finding the Fourth Proportional to 794.31, 1,188.41 and 480.80

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Solution

The fourth proportional to 794.31, 1,188.41 and 480.80 is: 719.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.31 : 1,188.41 = 480.80 : x
  2. Step 2: Convert to fraction form
    794.31/1,188.41 = 480.80/x
  3. Step 3: Cross multiply
    794.31x = 1,188.41 × 480.80
  4. Step 4: Simplify right side
    794.31x = 571,388.10
  5. Step 5: Solve for x
    x = 571,388.10/794.31
  6. Step 6: Final answer
    x = 719.35

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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.