Home / 1,226.79-1,840.19-1,139.31

Finding the Fourth Proportional to 1,226.79, 1,840.19 and 1,139.31

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Solution

The fourth proportional to 1,226.79, 1,840.19 and 1,139.31 is: 1,708.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.79 : 1,840.19 = 1,139.31 : x
  2. Step 2: Convert to fraction form
    1,226.79/1,840.19 = 1,139.31/x
  3. Step 3: Cross multiply
    1,226.79x = 1,840.19 × 1,139.31
  4. Step 4: Simplify right side
    1,226.79x = 2,096,541.17
  5. Step 5: Solve for x
    x = 2,096,541.17/1,226.79
  6. Step 6: Final answer
    x = 1,708.97

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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.