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Finding the Fourth Proportional to 268.58, 370.72 and 156.58

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Solution

The fourth proportional to 268.58, 370.72 and 156.58 is: 216.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.58 : 370.72 = 156.58 : x
  2. Step 2: Convert to fraction form
    268.58/370.72 = 156.58/x
  3. Step 3: Cross multiply
    268.58x = 370.72 × 156.58
  4. Step 4: Simplify right side
    268.58x = 58,046.02
  5. Step 5: Solve for x
    x = 58,046.02/268.58
  6. Step 6: Final answer
    x = 216.13

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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.