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Finding the Fourth Proportional to 1,252,849.68, 1,728,945.24 and 679,894.80

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Solution

The fourth proportional to 1,252,849.68, 1,728,945.24 and 679,894.80 is: 938,261.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252,849.68 : 1,728,945.24 = 679,894.80 : x
  2. Step 2: Convert to fraction form
    1,252,849.68/1,728,945.24 = 679,894.80/x
  3. Step 3: Cross multiply
    1,252,849.68x = 1,728,945.24 × 679,894.80
  4. Step 4: Simplify right side
    1,252,849.68x = 1,175,500,878,160.75
  5. Step 5: Solve for x
    x = 1,175,500,878,160.75/1,252,849.68
  6. Step 6: Final answer
    x = 938,261.71

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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.