Home / 1,639.68-2,262.36-1,143.36

Finding the Fourth Proportional to 1,639.68, 2,262.36 and 1,143.36

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Solution

The fourth proportional to 1,639.68, 2,262.36 and 1,143.36 is: 1,577.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.68 : 2,262.36 = 1,143.36 : x
  2. Step 2: Convert to fraction form
    1,639.68/2,262.36 = 1,143.36/x
  3. Step 3: Cross multiply
    1,639.68x = 2,262.36 × 1,143.36
  4. Step 4: Simplify right side
    1,639.68x = 2,586,691.93
  5. Step 5: Solve for x
    x = 2,586,691.93/1,639.68
  6. Step 6: Final answer
    x = 1,577.56

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1.5x scale

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.