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Finding the Fourth Proportional to 268.72, 370.86 and 165.28

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Solution

The fourth proportional to 268.72, 370.86 and 165.28 is: 228.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.72 : 370.86 = 165.28 : x
  2. Step 2: Convert to fraction form
    268.72/370.86 = 165.28/x
  3. Step 3: Cross multiply
    268.72x = 370.86 × 165.28
  4. Step 4: Simplify right side
    268.72x = 61,295.74
  5. Step 5: Solve for x
    x = 61,295.74/268.72
  6. Step 6: Final answer
    x = 228.10

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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.