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Finding the Fourth Proportional to 482.64, 666.06 and 286.08

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Solution

The fourth proportional to 482.64, 666.06 and 286.08 is: 394.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.64 : 666.06 = 286.08 : x
  2. Step 2: Convert to fraction form
    482.64/666.06 = 286.08/x
  3. Step 3: Cross multiply
    482.64x = 666.06 × 286.08
  4. Step 4: Simplify right side
    482.64x = 190,546.44
  5. Step 5: Solve for x
    x = 190,546.44/482.64
  6. Step 6: Final answer
    x = 394.80

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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.