Home / 2,639.61-3,642.62-1,644.39

Finding the Fourth Proportional to 2,639.61, 3,642.62 and 1,644.39

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Solution

The fourth proportional to 2,639.61, 3,642.62 and 1,644.39 is: 2,269.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.61 : 3,642.62 = 1,644.39 : x
  2. Step 2: Convert to fraction form
    2,639.61/3,642.62 = 1,644.39/x
  3. Step 3: Cross multiply
    2,639.61x = 3,642.62 × 1,644.39
  4. Step 4: Simplify right side
    2,639.61x = 5,989,879.68
  5. Step 5: Solve for x
    x = 5,989,879.68/2,639.61
  6. Step 6: Final answer
    x = 2,269.23

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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.