Home / 721,072.58-995,039.56-394,320.74

Finding the Fourth Proportional to 721,072.58, 995,039.56 and 394,320.74

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Solution

The fourth proportional to 721,072.58, 995,039.56 and 394,320.74 is: 544,140.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,072.58 : 995,039.56 = 394,320.74 : x
  2. Step 2: Convert to fraction form
    721,072.58/995,039.56 = 394,320.74/x
  3. Step 3: Cross multiply
    721,072.58x = 995,039.56 × 394,320.74
  4. Step 4: Simplify right side
    721,072.58x = 392,364,735,628.47
  5. Step 5: Solve for x
    x = 392,364,735,628.47/721,072.58
  6. Step 6: Final answer
    x = 544,140.42

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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.