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Finding the Fourth Proportional to 2,579,747.60, 3,869,708.78 and 686,490.86

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Solution

The fourth proportional to 2,579,747.60, 3,869,708.78 and 686,490.86 is: 1,029,759.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,579,747.60 : 3,869,708.78 = 686,490.86 : x
  2. Step 2: Convert to fraction form
    2,579,747.60/3,869,708.78 = 686,490.86/x
  3. Step 3: Cross multiply
    2,579,747.60x = 3,869,708.78 × 686,490.86
  4. Step 4: Simplify right side
    2,579,747.60x = 2,656,519,719,722.25
  5. Step 5: Solve for x
    x = 2,656,519,719,722.25/2,579,747.60
  6. Step 6: Final answer
    x = 1,029,759.55

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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.