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Finding the Fourth Proportional to 721,292.94, 995,384.16 and 394,608.60

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Solution

The fourth proportional to 721,292.94, 995,384.16 and 394,608.60 is: 544,559.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,292.94 : 995,384.16 = 394,608.60 : x
  2. Step 2: Convert to fraction form
    721,292.94/995,384.16 = 394,608.60/x
  3. Step 3: Cross multiply
    721,292.94x = 995,384.16 × 394,608.60
  4. Step 4: Simplify right side
    721,292.94x = 392,787,149,839.78
  5. Step 5: Solve for x
    x = 392,787,149,839.78/721,292.94
  6. Step 6: Final answer
    x = 544,559.81

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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.