Home / 1,292.12-1,945.49-1,139.03

Finding the Fourth Proportional to 1,292.12, 1,945.49 and 1,139.03

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Solution

The fourth proportional to 1,292.12, 1,945.49 and 1,139.03 is: 1,714.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.12 : 1,945.49 = 1,139.03 : x
  2. Step 2: Convert to fraction form
    1,292.12/1,945.49 = 1,139.03/x
  3. Step 3: Cross multiply
    1,292.12x = 1,945.49 × 1,139.03
  4. Step 4: Simplify right side
    1,292.12x = 2,215,956.05
  5. Step 5: Solve for x
    x = 2,215,956.05/1,292.12
  6. Step 6: Final answer
    x = 1,714.98

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.