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Finding the Fourth Proportional to 2,578.64, 3,869.04 and 1,853.96

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Solution

The fourth proportional to 2,578.64, 3,869.04 and 1,853.96 is: 2,781.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.64 : 3,869.04 = 1,853.96 : x
  2. Step 2: Convert to fraction form
    2,578.64/3,869.04 = 1,853.96/x
  3. Step 3: Cross multiply
    2,578.64x = 3,869.04 × 1,853.96
  4. Step 4: Simplify right side
    2,578.64x = 7,173,045.40
  5. Step 5: Solve for x
    x = 7,173,045.40/2,578.64
  6. Step 6: Final answer
    x = 2,781.72

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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.