Home / 1,679.83-2,318.40-1,016.78

Finding the Fourth Proportional to 1,679.83, 2,318.40 and 1,016.78

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Solution

The fourth proportional to 1,679.83, 2,318.40 and 1,016.78 is: 1,403.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.83 : 2,318.40 = 1,016.78 : x
  2. Step 2: Convert to fraction form
    1,679.83/2,318.40 = 1,016.78/x
  3. Step 3: Cross multiply
    1,679.83x = 2,318.40 × 1,016.78
  4. Step 4: Simplify right side
    1,679.83x = 2,357,291.16
  5. Step 5: Solve for x
    x = 2,357,291.16/1,679.83
  6. Step 6: Final answer
    x = 1,403.29

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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.