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Finding the Fourth Proportional to 721,292.96, 995,375.76 and 398,977.76

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Solution

The fourth proportional to 721,292.96, 995,375.76 and 398,977.76 is: 550,584.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,292.96 : 995,375.76 = 398,977.76 : x
  2. Step 2: Convert to fraction form
    721,292.96/995,375.76 = 398,977.76/x
  3. Step 3: Cross multiply
    721,292.96x = 995,375.76 × 398,977.76
  4. Step 4: Simplify right side
    721,292.96x = 397,132,791,083.10
  5. Step 5: Solve for x
    x = 397,132,791,083.10/721,292.96
  6. Step 6: Final answer
    x = 550,584.59

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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.