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Finding the Fourth Proportional to 543,903.20, 815,854.80 and 488,790.80

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Solution

The fourth proportional to 543,903.20, 815,854.80 and 488,790.80 is: 733,186.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,903.20 : 815,854.80 = 488,790.80 : x
  2. Step 2: Convert to fraction form
    543,903.20/815,854.80 = 488,790.80/x
  3. Step 3: Cross multiply
    543,903.20x = 815,854.80 × 488,790.80
  4. Step 4: Simplify right side
    543,903.20x = 398,782,320,375.84
  5. Step 5: Solve for x
    x = 398,782,320,375.84/543,903.20
  6. Step 6: Final answer
    x = 733,186.20

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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.