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Finding the Fourth Proportional to 482.71, 666.29 and 286.28

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Solution

The fourth proportional to 482.71, 666.29 and 286.28 is: 395.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.71 : 666.29 = 286.28 : x
  2. Step 2: Convert to fraction form
    482.71/666.29 = 286.28/x
  3. Step 3: Cross multiply
    482.71x = 666.29 × 286.28
  4. Step 4: Simplify right side
    482.71x = 190,744.07
  5. Step 5: Solve for x
    x = 190,744.07/482.71
  6. Step 6: Final answer
    x = 395.16

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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.