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Finding the Fourth Proportional to 872,409.90, 1,204,843.53 and 777,310.05

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Solution

The fourth proportional to 872,409.90, 1,204,843.53 and 777,310.05 is: 1,073,505.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,409.90 : 1,204,843.53 = 777,310.05 : x
  2. Step 2: Convert to fraction form
    872,409.90/1,204,843.53 = 777,310.05/x
  3. Step 3: Cross multiply
    872,409.90x = 1,204,843.53 × 777,310.05
  4. Step 4: Simplify right side
    872,409.90x = 936,536,984,546.48
  5. Step 5: Solve for x
    x = 936,536,984,546.48/872,409.90
  6. Step 6: Final answer
    x = 1,073,505.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.