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Finding the Fourth Proportional to 1,869.60, 2,798.28 and 1,375.87

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Solution

The fourth proportional to 1,869.60, 2,798.28 and 1,375.87 is: 2,059.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.60 : 2,798.28 = 1,375.87 : x
  2. Step 2: Convert to fraction form
    1,869.60/2,798.28 = 1,375.87/x
  3. Step 3: Cross multiply
    1,869.60x = 2,798.28 × 1,375.87
  4. Step 4: Simplify right side
    1,869.60x = 3,850,069.50
  5. Step 5: Solve for x
    x = 3,850,069.50/1,869.60
  6. Step 6: Final answer
    x = 2,059.30

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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.