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Finding the Fourth Proportional to 521.17, 719.22 and 300.12

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Solution

The fourth proportional to 521.17, 719.22 and 300.12 is: 414.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.17 : 719.22 = 300.12 : x
  2. Step 2: Convert to fraction form
    521.17/719.22 = 300.12/x
  3. Step 3: Cross multiply
    521.17x = 719.22 × 300.12
  4. Step 4: Simplify right side
    521.17x = 215,850.81
  5. Step 5: Solve for x
    x = 215,850.81/521.17
  6. Step 6: Final answer
    x = 414.17

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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.