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Finding the Fourth Proportional to 482.82, 666.39 and 308.13

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Solution

The fourth proportional to 482.82, 666.39 and 308.13 is: 425.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.82 : 666.39 = 308.13 : x
  2. Step 2: Convert to fraction form
    482.82/666.39 = 308.13/x
  3. Step 3: Cross multiply
    482.82x = 666.39 × 308.13
  4. Step 4: Simplify right side
    482.82x = 205,334.75
  5. Step 5: Solve for x
    x = 205,334.75/482.82
  6. Step 6: Final answer
    x = 425.28

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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.