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Finding the Fourth Proportional to 809,375.40, 1,214,063.10 and 765,829.80

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Solution

The fourth proportional to 809,375.40, 1,214,063.10 and 765,829.80 is: 1,148,744.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,375.40 : 1,214,063.10 = 765,829.80 : x
  2. Step 2: Convert to fraction form
    809,375.40/1,214,063.10 = 765,829.80/x
  3. Step 3: Cross multiply
    809,375.40x = 1,214,063.10 × 765,829.80
  4. Step 4: Simplify right side
    809,375.40x = 929,765,701,060.38
  5. Step 5: Solve for x
    x = 929,765,701,060.38/809,375.40
  6. Step 6: Final answer
    x = 1,148,744.70

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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.