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Finding the Fourth Proportional to 1,869.92, 2,809.20 and 1,813.76

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Solution

The fourth proportional to 1,869.92, 2,809.20 and 1,813.76 is: 2,724.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.92 : 2,809.20 = 1,813.76 : x
  2. Step 2: Convert to fraction form
    1,869.92/2,809.20 = 1,813.76/x
  3. Step 3: Cross multiply
    1,869.92x = 2,809.20 × 1,813.76
  4. Step 4: Simplify right side
    1,869.92x = 5,095,214.59
  5. Step 5: Solve for x
    x = 5,095,214.59/1,869.92
  6. Step 6: Final answer
    x = 2,724.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.