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Finding the Fourth Proportional to 869,169.40, 1,301,129.70 and 764,193.40

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Solution

The fourth proportional to 869,169.40, 1,301,129.70 and 764,193.40 is: 1,143,982.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,169.40 : 1,301,129.70 = 764,193.40 : x
  2. Step 2: Convert to fraction form
    869,169.40/1,301,129.70 = 764,193.40/x
  3. Step 3: Cross multiply
    869,169.40x = 1,301,129.70 × 764,193.40
  4. Step 4: Simplify right side
    869,169.40x = 994,314,729,283.98
  5. Step 5: Solve for x
    x = 994,314,729,283.98/869,169.40
  6. Step 6: Final answer
    x = 1,143,982.67

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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.