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Finding the Fourth Proportional to 482.56, 666 and 286.16

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Solution

The fourth proportional to 482.56, 666 and 286.16 is: 394.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.56 : 666 = 286.16 : x
  2. Step 2: Convert to fraction form
    482.56/666 = 286.16/x
  3. Step 3: Cross multiply
    482.56x = 666 × 286.16
  4. Step 4: Simplify right side
    482.56x = 190,582.56
  5. Step 5: Solve for x
    x = 190,582.56/482.56
  6. Step 6: Final answer
    x = 394.94

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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.