Home / 528,949.22-729,947.28-287,229.64

Finding the Fourth Proportional to 528,949.22, 729,947.28 and 287,229.64

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Solution

The fourth proportional to 528,949.22, 729,947.28 and 287,229.64 is: 396,375.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,949.22 : 729,947.28 = 287,229.64 : x
  2. Step 2: Convert to fraction form
    528,949.22/729,947.28 = 287,229.64/x
  3. Step 3: Cross multiply
    528,949.22x = 729,947.28 × 287,229.64
  4. Step 4: Simplify right side
    528,949.22x = 209,662,494,453.38
  5. Step 5: Solve for x
    x = 209,662,494,453.38/528,949.22
  6. Step 6: Final answer
    x = 396,375.47

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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.