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Finding the Fourth Proportional to 486.71, 667.81 and 482.12

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Solution

The fourth proportional to 486.71, 667.81 and 482.12 is: 661.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.71 : 667.81 = 482.12 : x
  2. Step 2: Convert to fraction form
    486.71/667.81 = 482.12/x
  3. Step 3: Cross multiply
    486.71x = 667.81 × 482.12
  4. Step 4: Simplify right side
    486.71x = 321,962.15
  5. Step 5: Solve for x
    x = 321,962.15/486.71
  6. Step 6: Final answer
    x = 661.51

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.