Home / 487,829.09-731,743.61-321,578.21

Finding the Fourth Proportional to 487,829.09, 731,743.61 and 321,578.21

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Solution

The fourth proportional to 487,829.09, 731,743.61 and 321,578.21 is: 482,367.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,829.09 : 731,743.61 = 321,578.21 : x
  2. Step 2: Convert to fraction form
    487,829.09/731,743.61 = 321,578.21/x
  3. Step 3: Cross multiply
    487,829.09x = 731,743.61 × 321,578.21
  4. Step 4: Simplify right side
    487,829.09x = 235,312,797,427.97
  5. Step 5: Solve for x
    x = 235,312,797,427.97/487,829.09
  6. Step 6: Final answer
    x = 482,367.30

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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.