Home / 721,947.72-996,299.64-395,255.28

Finding the Fourth Proportional to 721,947.72, 996,299.64 and 395,255.28

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Solution

The fourth proportional to 721,947.72, 996,299.64 and 395,255.28 is: 545,458.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,947.72 : 996,299.64 = 395,255.28 : x
  2. Step 2: Convert to fraction form
    721,947.72/996,299.64 = 395,255.28/x
  3. Step 3: Cross multiply
    721,947.72x = 996,299.64 × 395,255.28
  4. Step 4: Simplify right side
    721,947.72x = 393,792,693,172.10
  5. Step 5: Solve for x
    x = 393,792,693,172.10/721,947.72
  6. Step 6: Final answer
    x = 545,458.74

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1.5x scale

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.