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Finding the Fourth Proportional to 869,072.70, 1,303,609.05 and 764,010.30

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Solution

The fourth proportional to 869,072.70, 1,303,609.05 and 764,010.30 is: 1,146,015.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,072.70 : 1,303,609.05 = 764,010.30 : x
  2. Step 2: Convert to fraction form
    869,072.70/1,303,609.05 = 764,010.30/x
  3. Step 3: Cross multiply
    869,072.70x = 1,303,609.05 × 764,010.30
  4. Step 4: Simplify right side
    869,072.70x = 995,970,741,373.22
  5. Step 5: Solve for x
    x = 995,970,741,373.22/869,072.70
  6. Step 6: Final answer
    x = 1,146,015.45

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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.