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Finding the Fourth Proportional to 479.24, 661.62 and 449.96

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Solution

The fourth proportional to 479.24, 661.62 and 449.96 is: 621.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.24 : 661.62 = 449.96 : x
  2. Step 2: Convert to fraction form
    479.24/661.62 = 449.96/x
  3. Step 3: Cross multiply
    479.24x = 661.62 × 449.96
  4. Step 4: Simplify right side
    479.24x = 297,702.54
  5. Step 5: Solve for x
    x = 297,702.54/479.24
  6. Step 6: Final answer
    x = 621.20

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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.