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Finding the Fourth Proportional to 1,252,916.68, 1,729,037.78 and 679,961.80

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Solution

The fourth proportional to 1,252,916.68, 1,729,037.78 and 679,961.80 is: 938,354.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252,916.68 : 1,729,037.78 = 679,961.80 : x
  2. Step 2: Convert to fraction form
    1,252,916.68/1,729,037.78 = 679,961.80/x
  3. Step 3: Cross multiply
    1,252,916.68x = 1,729,037.78 × 679,961.80
  4. Step 4: Simplify right side
    1,252,916.68x = 1,175,679,641,156.80
  5. Step 5: Solve for x
    x = 1,175,679,641,156.80/1,252,916.68
  6. Step 6: Final answer
    x = 938,354.21

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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.