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Finding the Fourth Proportional to 286.02, 394.65 and 187.92

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Solution

The fourth proportional to 286.02, 394.65 and 187.92 is: 259.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.02 : 394.65 = 187.92 : x
  2. Step 2: Convert to fraction form
    286.02/394.65 = 187.92/x
  3. Step 3: Cross multiply
    286.02x = 394.65 × 187.92
  4. Step 4: Simplify right side
    286.02x = 74,162.63
  5. Step 5: Solve for x
    x = 74,162.63/286.02
  6. Step 6: Final answer
    x = 259.29

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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.