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Finding the Fourth Proportional to 482.68, 666.62 and 308.13

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Solution

The fourth proportional to 482.68, 666.62 and 308.13 is: 425.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.68 : 666.62 = 308.13 : x
  2. Step 2: Convert to fraction form
    482.68/666.62 = 308.13/x
  3. Step 3: Cross multiply
    482.68x = 666.62 × 308.13
  4. Step 4: Simplify right side
    482.68x = 205,405.62
  5. Step 5: Solve for x
    x = 205,405.62/482.68
  6. Step 6: Final answer
    x = 425.55

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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.