Home / 5,285.45-7,921.28-2,945.36

Finding the Fourth Proportional to 5,285.45, 7,921.28 and 2,945.36

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Solution

The fourth proportional to 5,285.45, 7,921.28 and 2,945.36 is: 4,414.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,285.45 : 7,921.28 = 2,945.36 : x
  2. Step 2: Convert to fraction form
    5,285.45/7,921.28 = 2,945.36/x
  3. Step 3: Cross multiply
    5,285.45x = 7,921.28 × 2,945.36
  4. Step 4: Simplify right side
    5,285.45x = 23,331,021.26
  5. Step 5: Solve for x
    x = 23,331,021.26/5,285.45
  6. Step 6: Final answer
    x = 4,414.20

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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.