Home / 1,327,478.47-1,991,229.23-428,920.31

Finding the Fourth Proportional to 1,327,478.47, 1,991,229.23 and 428,920.31

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Solution

The fourth proportional to 1,327,478.47, 1,991,229.23 and 428,920.31 is: 643,384.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327,478.47 : 1,991,229.23 = 428,920.31 : x
  2. Step 2: Convert to fraction form
    1,327,478.47/1,991,229.23 = 428,920.31/x
  3. Step 3: Cross multiply
    1,327,478.47x = 1,991,229.23 × 428,920.31
  4. Step 4: Simplify right side
    1,327,478.47x = 854,078,662,250.36
  5. Step 5: Solve for x
    x = 854,078,662,250.36/1,327,478.47
  6. Step 6: Final answer
    x = 643,384.19

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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.