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Finding the Fourth Proportional to 721,291.96, 995,382.76 and 394,607.60

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Solution

The fourth proportional to 721,291.96, 995,382.76 and 394,607.60 is: 544,558.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,291.96 : 995,382.76 = 394,607.60 : x
  2. Step 2: Convert to fraction form
    721,291.96/995,382.76 = 394,607.60/x
  3. Step 3: Cross multiply
    721,291.96x = 995,382.76 × 394,607.60
  4. Step 4: Simplify right side
    721,291.96x = 392,785,602,004.98
  5. Step 5: Solve for x
    x = 392,785,602,004.98/721,291.96
  6. Step 6: Final answer
    x = 544,558.41

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Double scale
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Similar ratio
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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.