Home / 1,913.94-2,639.32-1,809.86

Finding the Fourth Proportional to 1,913.94, 2,639.32 and 1,809.86

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Solution

The fourth proportional to 1,913.94, 2,639.32 and 1,809.86 is: 2,495.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.94 : 2,639.32 = 1,809.86 : x
  2. Step 2: Convert to fraction form
    1,913.94/2,639.32 = 1,809.86/x
  3. Step 3: Cross multiply
    1,913.94x = 2,639.32 × 1,809.86
  4. Step 4: Simplify right side
    1,913.94x = 4,776,781.97
  5. Step 5: Solve for x
    x = 4,776,781.97/1,913.94
  6. Step 6: Final answer
    x = 2,495.78

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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.