Home / 770,468.85-1,155,915.90-321,400.80

Finding the Fourth Proportional to 770,468.85, 1,155,915.90 and 321,400.80

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Solution

The fourth proportional to 770,468.85, 1,155,915.90 and 321,400.80 is: 482,189.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    770,468.85 : 1,155,915.90 = 321,400.80 : x
  2. Step 2: Convert to fraction form
    770,468.85/1,155,915.90 = 321,400.80/x
  3. Step 3: Cross multiply
    770,468.85x = 1,155,915.90 × 321,400.80
  4. Step 4: Simplify right side
    770,468.85x = 371,512,294,992.72
  5. Step 5: Solve for x
    x = 371,512,294,992.72/770,468.85
  6. Step 6: Final answer
    x = 482,189.90

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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.