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Finding the Fourth Proportional to 521.20, 719.22 and 297.15

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Solution

The fourth proportional to 521.20, 719.22 and 297.15 is: 410.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.20 : 719.22 = 297.15 : x
  2. Step 2: Convert to fraction form
    521.20/719.22 = 297.15/x
  3. Step 3: Cross multiply
    521.20x = 719.22 × 297.15
  4. Step 4: Simplify right side
    521.20x = 213,716.22
  5. Step 5: Solve for x
    x = 213,716.22/521.20
  6. Step 6: Final answer
    x = 410.05

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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.