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Finding the Fourth Proportional to 1,299,769.40, 1,947,029.70 and 738,147.80

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Solution

The fourth proportional to 1,299,769.40, 1,947,029.70 and 738,147.80 is: 1,105,731.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299,769.40 : 1,947,029.70 = 738,147.80 : x
  2. Step 2: Convert to fraction form
    1,299,769.40/1,947,029.70 = 738,147.80/x
  3. Step 3: Cross multiply
    1,299,769.40x = 1,947,029.70 × 738,147.80
  4. Step 4: Simplify right side
    1,299,769.40x = 1,437,195,689,589.66
  5. Step 5: Solve for x
    x = 1,437,195,689,589.66/1,299,769.40
  6. Step 6: Final answer
    x = 1,105,731.29

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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.