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Finding the Fourth Proportional to 620.15, 932.05 and 552.72

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Solution

The fourth proportional to 620.15, 932.05 and 552.72 is: 830.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.15 : 932.05 = 552.72 : x
  2. Step 2: Convert to fraction form
    620.15/932.05 = 552.72/x
  3. Step 3: Cross multiply
    620.15x = 932.05 × 552.72
  4. Step 4: Simplify right side
    620.15x = 515,162.68
  5. Step 5: Solve for x
    x = 515,162.68/620.15
  6. Step 6: Final answer
    x = 830.71

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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.