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Finding the Fourth Proportional to 1,272,579.30, 1,908,769.73 and 739,760.49

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Solution

The fourth proportional to 1,272,579.30, 1,908,769.73 and 739,760.49 is: 1,109,583.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272,579.30 : 1,908,769.73 = 739,760.49 : x
  2. Step 2: Convert to fraction form
    1,272,579.30/1,908,769.73 = 739,760.49/x
  3. Step 3: Cross multiply
    1,272,579.30x = 1,908,769.73 × 739,760.49
  4. Step 4: Simplify right side
    1,272,579.30x = 1,412,032,427,063.17
  5. Step 5: Solve for x
    x = 1,412,032,427,063.17/1,272,579.30
  6. Step 6: Final answer
    x = 1,109,583.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.