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Finding the Fourth Proportional to 1,869.32, 2,578.14 and 1,644.77

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Solution

The fourth proportional to 1,869.32, 2,578.14 and 1,644.77 is: 2,268.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.32 : 2,578.14 = 1,644.77 : x
  2. Step 2: Convert to fraction form
    1,869.32/2,578.14 = 1,644.77/x
  3. Step 3: Cross multiply
    1,869.32x = 2,578.14 × 1,644.77
  4. Step 4: Simplify right side
    1,869.32x = 4,240,434.44
  5. Step 5: Solve for x
    x = 4,240,434.44/1,869.32
  6. Step 6: Final answer
    x = 2,268.44

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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.