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Finding the Fourth Proportional to 297.10, 409.89 and 186.58

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Solution

The fourth proportional to 297.10, 409.89 and 186.58 is: 257.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.10 : 409.89 = 186.58 : x
  2. Step 2: Convert to fraction form
    297.10/409.89 = 186.58/x
  3. Step 3: Cross multiply
    297.10x = 409.89 × 186.58
  4. Step 4: Simplify right side
    297.10x = 76,477.28
  5. Step 5: Solve for x
    x = 76,477.28/297.10
  6. Step 6: Final answer
    x = 257.41

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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.