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Finding the Fourth Proportional to 286.47, 395.28 and 188.46

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Solution

The fourth proportional to 286.47, 395.28 and 188.46 is: 260.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.47 : 395.28 = 188.46 : x
  2. Step 2: Convert to fraction form
    286.47/395.28 = 188.46/x
  3. Step 3: Cross multiply
    286.47x = 395.28 × 188.46
  4. Step 4: Simplify right side
    286.47x = 74,494.47
  5. Step 5: Solve for x
    x = 74,494.47/286.47
  6. Step 6: Final answer
    x = 260.04

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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.