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Finding the Fourth Proportional to 1,260,753.62, 1,739,805.55 and 687,793.64

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Solution

The fourth proportional to 1,260,753.62, 1,739,805.55 and 687,793.64 is: 949,136.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260,753.62 : 1,739,805.55 = 687,793.64 : x
  2. Step 2: Convert to fraction form
    1,260,753.62/1,739,805.55 = 687,793.64/x
  3. Step 3: Cross multiply
    1,260,753.62x = 1,739,805.55 × 687,793.64
  4. Step 4: Simplify right side
    1,260,753.62x = 1,196,627,181,708.19
  5. Step 5: Solve for x
    x = 1,196,627,181,708.19/1,260,753.62
  6. Step 6: Final answer
    x = 949,136.43

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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.