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Finding the Fourth Proportional to 268.86, 371.03 and 158.34

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Solution

The fourth proportional to 268.86, 371.03 and 158.34 is: 218.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.86 : 371.03 = 158.34 : x
  2. Step 2: Convert to fraction form
    268.86/371.03 = 158.34/x
  3. Step 3: Cross multiply
    268.86x = 371.03 × 158.34
  4. Step 4: Simplify right side
    268.86x = 58,746.24
  5. Step 5: Solve for x
    x = 58,746.24/268.86
  6. Step 6: Final answer
    x = 218.51

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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.