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Finding the Fourth Proportional to 677.42, 1,016.27 and 215.27

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Solution

The fourth proportional to 677.42, 1,016.27 and 215.27 is: 322.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.42 : 1,016.27 = 215.27 : x
  2. Step 2: Convert to fraction form
    677.42/1,016.27 = 215.27/x
  3. Step 3: Cross multiply
    677.42x = 1,016.27 × 215.27
  4. Step 4: Simplify right side
    677.42x = 218,766.29
  5. Step 5: Solve for x
    x = 218,766.29/677.42
  6. Step 6: Final answer
    x = 322.94

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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.