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Finding the Fourth Proportional to 574.40, 792 and 481.28

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Solution

The fourth proportional to 574.40, 792 and 481.28 is: 663.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.40 : 792 = 481.28 : x
  2. Step 2: Convert to fraction form
    574.40/792 = 481.28/x
  3. Step 3: Cross multiply
    574.40x = 792 × 481.28
  4. Step 4: Simplify right side
    574.40x = 381,173.76
  5. Step 5: Solve for x
    x = 381,173.76/574.40
  6. Step 6: Final answer
    x = 663.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.