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Finding the Fourth Proportional to 1,252,874.43, 1,728,979.40 and 679,919.55

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Solution

The fourth proportional to 1,252,874.43, 1,728,979.40 and 679,919.55 is: 938,295.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252,874.43 : 1,728,979.40 = 679,919.55 : x
  2. Step 2: Convert to fraction form
    1,252,874.43/1,728,979.40 = 679,919.55/x
  3. Step 3: Cross multiply
    1,252,874.43x = 1,728,979.40 × 679,919.55
  4. Step 4: Simplify right side
    1,252,874.43x = 1,175,566,892,207.67
  5. Step 5: Solve for x
    x = 1,175,566,892,207.67/1,252,874.43
  6. Step 6: Final answer
    x = 938,295.86

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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.