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Finding the Fourth Proportional to 268.63, 370.61 and 158.11

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Solution

The fourth proportional to 268.63, 370.61 and 158.11 is: 218.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.63 : 370.61 = 158.11 : x
  2. Step 2: Convert to fraction form
    268.63/370.61 = 158.11/x
  3. Step 3: Cross multiply
    268.63x = 370.61 × 158.11
  4. Step 4: Simplify right side
    268.63x = 58,597.15
  5. Step 5: Solve for x
    x = 58,597.15/268.63
  6. Step 6: Final answer
    x = 218.13

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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.