Home / 716,403.45-988,629.66-394,113.90

Finding the Fourth Proportional to 716,403.45, 988,629.66 and 394,113.90

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Solution

The fourth proportional to 716,403.45, 988,629.66 and 394,113.90 is: 543,873.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,403.45 : 988,629.66 = 394,113.90 : x
  2. Step 2: Convert to fraction form
    716,403.45/988,629.66 = 394,113.90/x
  3. Step 3: Cross multiply
    716,403.45x = 988,629.66 × 394,113.90
  4. Step 4: Simplify right side
    716,403.45x = 389,632,690,958.27
  5. Step 5: Solve for x
    x = 389,632,690,958.27/716,403.45
  6. Step 6: Final answer
    x = 543,873.28

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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.