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Finding the Fourth Proportional to 521.86, 720.22 and 344.74

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Solution

The fourth proportional to 521.86, 720.22 and 344.74 is: 475.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.86 : 720.22 = 344.74 : x
  2. Step 2: Convert to fraction form
    521.86/720.22 = 344.74/x
  3. Step 3: Cross multiply
    521.86x = 720.22 × 344.74
  4. Step 4: Simplify right side
    521.86x = 248,288.64
  5. Step 5: Solve for x
    x = 248,288.64/521.86
  6. Step 6: Final answer
    x = 475.78

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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.