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Finding the Fourth Proportional to 619.39, 927.42 and 511.66

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Solution

The fourth proportional to 619.39, 927.42 and 511.66 is: 766.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.39 : 927.42 = 511.66 : x
  2. Step 2: Convert to fraction form
    619.39/927.42 = 511.66/x
  3. Step 3: Cross multiply
    619.39x = 927.42 × 511.66
  4. Step 4: Simplify right side
    619.39x = 474,523.72
  5. Step 5: Solve for x
    x = 474,523.72/619.39
  6. Step 6: Final answer
    x = 766.11

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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.