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Finding the Fourth Proportional to 268.76, 370.96 and 158.30

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Solution

The fourth proportional to 268.76, 370.96 and 158.30 is: 218.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.76 : 370.96 = 158.30 : x
  2. Step 2: Convert to fraction form
    268.76/370.96 = 158.30/x
  3. Step 3: Cross multiply
    268.76x = 370.96 × 158.30
  4. Step 4: Simplify right side
    268.76x = 58,722.97
  5. Step 5: Solve for x
    x = 58,722.97/268.76
  6. Step 6: Final answer
    x = 218.50

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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.