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Finding the Fourth Proportional to 460.82, 690.83 and 217.17

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Solution

The fourth proportional to 460.82, 690.83 and 217.17 is: 325.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.82 : 690.83 = 217.17 : x
  2. Step 2: Convert to fraction form
    460.82/690.83 = 217.17/x
  3. Step 3: Cross multiply
    460.82x = 690.83 × 217.17
  4. Step 4: Simplify right side
    460.82x = 150,026.47
  5. Step 5: Solve for x
    x = 150,026.47/460.82
  6. Step 6: Final answer
    x = 325.57

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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.