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Finding the Fourth Proportional to 819,786.60, 1,229,679.90 and 763,799.40

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Solution

The fourth proportional to 819,786.60, 1,229,679.90 and 763,799.40 is: 1,145,699.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,786.60 : 1,229,679.90 = 763,799.40 : x
  2. Step 2: Convert to fraction form
    819,786.60/1,229,679.90 = 763,799.40/x
  3. Step 3: Cross multiply
    819,786.60x = 1,229,679.90 × 763,799.40
  4. Step 4: Simplify right side
    819,786.60x = 939,228,769,812.06
  5. Step 5: Solve for x
    x = 939,228,769,812.06/819,786.60
  6. Step 6: Final answer
    x = 1,145,699.10

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.