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Finding the Fourth Proportional to 1,252,877.50, 1,728,972.17 and 679,917.79

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Solution

The fourth proportional to 1,252,877.50, 1,728,972.17 and 679,917.79 is: 938,287.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252,877.50 : 1,728,972.17 = 679,917.79 : x
  2. Step 2: Convert to fraction form
    1,252,877.50/1,728,972.17 = 679,917.79/x
  3. Step 3: Cross multiply
    1,252,877.50x = 1,728,972.17 × 679,917.79
  4. Step 4: Simplify right side
    1,252,877.50x = 1,175,558,936,797.90
  5. Step 5: Solve for x
    x = 1,175,558,936,797.90/1,252,877.50
  6. Step 6: Final answer
    x = 938,287.21

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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.