Home / 1,639.64-2,261.22-1,079.93

Finding the Fourth Proportional to 1,639.64, 2,261.22 and 1,079.93

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Solution

The fourth proportional to 1,639.64, 2,261.22 and 1,079.93 is: 1,489.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.64 : 2,261.22 = 1,079.93 : x
  2. Step 2: Convert to fraction form
    1,639.64/2,261.22 = 1,079.93/x
  3. Step 3: Cross multiply
    1,639.64x = 2,261.22 × 1,079.93
  4. Step 4: Simplify right side
    1,639.64x = 2,441,959.31
  5. Step 5: Solve for x
    x = 2,441,959.31/1,639.64
  6. Step 6: Final answer
    x = 1,489.33

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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.