Home / 721,019.88-1,081,675.72-321,660.67

Finding the Fourth Proportional to 721,019.88, 1,081,675.72 and 321,660.67

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Solution

The fourth proportional to 721,019.88, 1,081,675.72 and 321,660.67 is: 482,556.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,019.88 : 1,081,675.72 = 321,660.67 : x
  2. Step 2: Convert to fraction form
    721,019.88/1,081,675.72 = 321,660.67/x
  3. Step 3: Cross multiply
    721,019.88x = 1,081,675.72 × 321,660.67
  4. Step 4: Simplify right side
    721,019.88x = 347,932,536,543.96
  5. Step 5: Solve for x
    x = 347,932,536,543.96/721,019.88
  6. Step 6: Final answer
    x = 482,556.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.