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Finding the Fourth Proportional to 721,538.75, 995,655.66 and 488,491.61

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Solution

The fourth proportional to 721,538.75, 995,655.66 and 488,491.61 is: 674,072.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,538.75 : 995,655.66 = 488,491.61 : x
  2. Step 2: Convert to fraction form
    721,538.75/995,655.66 = 488,491.61/x
  3. Step 3: Cross multiply
    721,538.75x = 995,655.66 × 488,491.61
  4. Step 4: Simplify right side
    721,538.75x = 486,369,431,380.73
  5. Step 5: Solve for x
    x = 486,369,431,380.73/721,538.75
  6. Step 6: Final answer
    x = 674,072.51

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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.