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Finding the Fourth Proportional to 479.22, 662.37 and 402.90

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Solution

The fourth proportional to 479.22, 662.37 and 402.90 is: 556.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.22 : 662.37 = 402.90 : x
  2. Step 2: Convert to fraction form
    479.22/662.37 = 402.90/x
  3. Step 3: Cross multiply
    479.22x = 662.37 × 402.90
  4. Step 4: Simplify right side
    479.22x = 266,868.87
  5. Step 5: Solve for x
    x = 266,868.87/479.22
  6. Step 6: Final answer
    x = 556.88

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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.