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Finding the Fourth Proportional to 819,107.40, 1,228,661.10 and 808,609.80

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Solution

The fourth proportional to 819,107.40, 1,228,661.10 and 808,609.80 is: 1,212,914.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,107.40 : 1,228,661.10 = 808,609.80 : x
  2. Step 2: Convert to fraction form
    819,107.40/1,228,661.10 = 808,609.80/x
  3. Step 3: Cross multiply
    819,107.40x = 1,228,661.10 × 808,609.80
  4. Step 4: Simplify right side
    819,107.40x = 993,507,406,338.78
  5. Step 5: Solve for x
    x = 993,507,406,338.78/819,107.40
  6. Step 6: Final answer
    x = 1,212,914.70

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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.