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Finding the Fourth Proportional to 202.76, 304.47 and 125.72

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Solution

The fourth proportional to 202.76, 304.47 and 125.72 is: 188.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.76 : 304.47 = 125.72 : x
  2. Step 2: Convert to fraction form
    202.76/304.47 = 125.72/x
  3. Step 3: Cross multiply
    202.76x = 304.47 × 125.72
  4. Step 4: Simplify right side
    202.76x = 38,276.45
  5. Step 5: Solve for x
    x = 38,276.45/202.76
  6. Step 6: Final answer
    x = 188.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.