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Finding the Fourth Proportional to 479.28, 663.91 and 469.56

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Solution

The fourth proportional to 479.28, 663.91 and 469.56 is: 650.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.28 : 663.91 = 469.56 : x
  2. Step 2: Convert to fraction form
    479.28/663.91 = 469.56/x
  3. Step 3: Cross multiply
    479.28x = 663.91 × 469.56
  4. Step 4: Simplify right side
    479.28x = 311,745.58
  5. Step 5: Solve for x
    x = 311,745.58/479.28
  6. Step 6: Final answer
    x = 650.45

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.