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Finding the Fourth Proportional to 718,812.28, 991,958.16 and 396,542.44

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Solution

The fourth proportional to 718,812.28, 991,958.16 and 396,542.44 is: 547,227.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,812.28 : 991,958.16 = 396,542.44 : x
  2. Step 2: Convert to fraction form
    718,812.28/991,958.16 = 396,542.44/x
  3. Step 3: Cross multiply
    718,812.28x = 991,958.16 × 396,542.44
  4. Step 4: Simplify right side
    718,812.28x = 393,353,509,144.31
  5. Step 5: Solve for x
    x = 393,353,509,144.31/718,812.28
  6. Step 6: Final answer
    x = 547,227.03

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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.