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Finding the Fourth Proportional to 207.18, 285.66 and 165.60

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Solution

The fourth proportional to 207.18, 285.66 and 165.60 is: 228.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.18 : 285.66 = 165.60 : x
  2. Step 2: Convert to fraction form
    207.18/285.66 = 165.60/x
  3. Step 3: Cross multiply
    207.18x = 285.66 × 165.60
  4. Step 4: Simplify right side
    207.18x = 47,305.30
  5. Step 5: Solve for x
    x = 47,305.30/207.18
  6. Step 6: Final answer
    x = 228.33

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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.