Home / 1,016.28-1,403.19-623.43

Finding the Fourth Proportional to 1,016.28, 1,403.19 and 623.43

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Solution

The fourth proportional to 1,016.28, 1,403.19 and 623.43 is: 860.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,016.28 : 1,403.19 = 623.43 : x
  2. Step 2: Convert to fraction form
    1,016.28/1,403.19 = 623.43/x
  3. Step 3: Cross multiply
    1,016.28x = 1,403.19 × 623.43
  4. Step 4: Simplify right side
    1,016.28x = 874,790.74
  5. Step 5: Solve for x
    x = 874,790.74/1,016.28
  6. Step 6: Final answer
    x = 860.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.