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Finding the Fourth Proportional to 287.64, 397.06 and 194.44

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Solution

The fourth proportional to 287.64, 397.06 and 194.44 is: 268.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.64 : 397.06 = 194.44 : x
  2. Step 2: Convert to fraction form
    287.64/397.06 = 194.44/x
  3. Step 3: Cross multiply
    287.64x = 397.06 × 194.44
  4. Step 4: Simplify right side
    287.64x = 77,204.35
  5. Step 5: Solve for x
    x = 77,204.35/287.64
  6. Step 6: Final answer
    x = 268.41

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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.