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Finding the Fourth Proportional to 869,145.40, 1,301,093.70 and 764,169.40

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Solution

The fourth proportional to 869,145.40, 1,301,093.70 and 764,169.40 is: 1,143,946.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,145.40 : 1,301,093.70 = 764,169.40 : x
  2. Step 2: Convert to fraction form
    869,145.40/1,301,093.70 = 764,169.40/x
  3. Step 3: Cross multiply
    869,145.40x = 1,301,093.70 × 764,169.40
  4. Step 4: Simplify right side
    869,145.40x = 994,255,992,072.78
  5. Step 5: Solve for x
    x = 994,255,992,072.78/869,145.40
  6. Step 6: Final answer
    x = 1,143,946.68

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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.