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Finding the Fourth Proportional to 482.91, 666.41 and 308.36

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Solution

The fourth proportional to 482.91, 666.41 and 308.36 is: 425.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.91 : 666.41 = 308.36 : x
  2. Step 2: Convert to fraction form
    482.91/666.41 = 308.36/x
  3. Step 3: Cross multiply
    482.91x = 666.41 × 308.36
  4. Step 4: Simplify right side
    482.91x = 205,491.63
  5. Step 5: Solve for x
    x = 205,491.63/482.91
  6. Step 6: Final answer
    x = 425.53

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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.