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Finding the Fourth Proportional to 479.22, 720.26 and 397.49

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Solution

The fourth proportional to 479.22, 720.26 and 397.49 is: 597.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.22 : 720.26 = 397.49 : x
  2. Step 2: Convert to fraction form
    479.22/720.26 = 397.49/x
  3. Step 3: Cross multiply
    479.22x = 720.26 × 397.49
  4. Step 4: Simplify right side
    479.22x = 286,296.24
  5. Step 5: Solve for x
    x = 286,296.24/479.22
  6. Step 6: Final answer
    x = 597.43

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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.