Home / 1,986.40-2,976.22-1,292.01

Finding the Fourth Proportional to 1,986.40, 2,976.22 and 1,292.01

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Solution

The fourth proportional to 1,986.40, 2,976.22 and 1,292.01 is: 1,935.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.40 : 2,976.22 = 1,292.01 : x
  2. Step 2: Convert to fraction form
    1,986.40/2,976.22 = 1,292.01/x
  3. Step 3: Cross multiply
    1,986.40x = 2,976.22 × 1,292.01
  4. Step 4: Simplify right side
    1,986.40x = 3,845,306.00
  5. Step 5: Solve for x
    x = 3,845,306.00/1,986.40
  6. Step 6: Final answer
    x = 1,935.82

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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.