Home / 1,869.14-2,781.65-1,806.85

Finding the Fourth Proportional to 1,869.14, 2,781.65 and 1,806.85

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Solution

The fourth proportional to 1,869.14, 2,781.65 and 1,806.85 is: 2,688.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.14 : 2,781.65 = 1,806.85 : x
  2. Step 2: Convert to fraction form
    1,869.14/2,781.65 = 1,806.85/x
  3. Step 3: Cross multiply
    1,869.14x = 2,781.65 × 1,806.85
  4. Step 4: Simplify right side
    1,869.14x = 5,026,018.75
  5. Step 5: Solve for x
    x = 5,026,018.75/1,869.14
  6. Step 6: Final answer
    x = 2,688.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.