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Finding the Fourth Proportional to 268.58, 370.66 and 158.00

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Solution

The fourth proportional to 268.58, 370.66 and 158.00 is: 218.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.58 : 370.66 = 158.00 : x
  2. Step 2: Convert to fraction form
    268.58/370.66 = 158.00/x
  3. Step 3: Cross multiply
    268.58x = 370.66 × 158.00
  4. Step 4: Simplify right side
    268.58x = 58,562.03
  5. Step 5: Solve for x
    x = 58,562.03/268.58
  6. Step 6: Final answer
    x = 218.05

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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.