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Finding the Fourth Proportional to 202.15, 279.06 and 165.70

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Solution

The fourth proportional to 202.15, 279.06 and 165.70 is: 228.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.15 : 279.06 = 165.70 : x
  2. Step 2: Convert to fraction form
    202.15/279.06 = 165.70/x
  3. Step 3: Cross multiply
    202.15x = 279.06 × 165.70
  4. Step 4: Simplify right side
    202.15x = 46,239.41
  5. Step 5: Solve for x
    x = 46,239.41/202.15
  6. Step 6: Final answer
    x = 228.74

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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.