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Finding the Fourth Proportional to 482.88, 666.46 and 308.28

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Solution

The fourth proportional to 482.88, 666.46 and 308.28 is: 425.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.88 : 666.46 = 308.28 : x
  2. Step 2: Convert to fraction form
    482.88/666.46 = 308.28/x
  3. Step 3: Cross multiply
    482.88x = 666.46 × 308.28
  4. Step 4: Simplify right side
    482.88x = 205,456.29
  5. Step 5: Solve for x
    x = 205,456.29/482.88
  6. Step 6: Final answer
    x = 425.48

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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.