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Finding the Fourth Proportional to 1,324,685, 1,987,214.38 and 425,825.48

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Solution

The fourth proportional to 1,324,685, 1,987,214.38 and 425,825.48 is: 638,798.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324,685 : 1,987,214.38 = 425,825.48 : x
  2. Step 2: Convert to fraction form
    1,324,685/1,987,214.38 = 425,825.48/x
  3. Step 3: Cross multiply
    1,324,685x = 1,987,214.38 × 425,825.48
  4. Step 4: Simplify right side
    1,324,685x = 846,206,517,226.40
  5. Step 5: Solve for x
    x = 846,206,517,226.40/1,324,685
  6. Step 6: Final answer
    x = 638,798.29

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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.