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Finding the Fourth Proportional to 543,622.90, 815,563.95 and 262,909.30

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Solution

The fourth proportional to 543,622.90, 815,563.95 and 262,909.30 is: 394,426.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,622.90 : 815,563.95 = 262,909.30 : x
  2. Step 2: Convert to fraction form
    543,622.90/815,563.95 = 262,909.30/x
  3. Step 3: Cross multiply
    543,622.90x = 815,563.95 × 262,909.30
  4. Step 4: Simplify right side
    543,622.90x = 214,419,347,199.74
  5. Step 5: Solve for x
    x = 214,419,347,199.74/543,622.90
  6. Step 6: Final answer
    x = 394,426.63

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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.