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Finding the Fourth Proportional to 482.68, 666.12 and 286.12

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Solution

The fourth proportional to 482.68, 666.12 and 286.12 is: 394.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.68 : 666.12 = 286.12 : x
  2. Step 2: Convert to fraction form
    482.68/666.12 = 286.12/x
  3. Step 3: Cross multiply
    482.68x = 666.12 × 286.12
  4. Step 4: Simplify right side
    482.68x = 190,590.25
  5. Step 5: Solve for x
    x = 190,590.25/482.68
  6. Step 6: Final answer
    x = 394.86

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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.