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Finding the Fourth Proportional to 460.49, 690.12 and 217.08

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Solution

The fourth proportional to 460.49, 690.12 and 217.08 is: 325.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.49 : 690.12 = 217.08 : x
  2. Step 2: Convert to fraction form
    460.49/690.12 = 217.08/x
  3. Step 3: Cross multiply
    460.49x = 690.12 × 217.08
  4. Step 4: Simplify right side
    460.49x = 149,811.25
  5. Step 5: Solve for x
    x = 149,811.25/460.49
  6. Step 6: Final answer
    x = 325.33

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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.