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Finding the Fourth Proportional to 677.38, 1,016.13 and 190.43

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Solution

The fourth proportional to 677.38, 1,016.13 and 190.43 is: 285.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.38 : 1,016.13 = 190.43 : x
  2. Step 2: Convert to fraction form
    677.38/1,016.13 = 190.43/x
  3. Step 3: Cross multiply
    677.38x = 1,016.13 × 190.43
  4. Step 4: Simplify right side
    677.38x = 193,501.64
  5. Step 5: Solve for x
    x = 193,501.64/677.38
  6. Step 6: Final answer
    x = 285.66

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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.