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Finding the Fourth Proportional to 827,812.80, 1,241,719.20 and 764,827.20

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Solution

The fourth proportional to 827,812.80, 1,241,719.20 and 764,827.20 is: 1,147,240.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,812.80 : 1,241,719.20 = 764,827.20 : x
  2. Step 2: Convert to fraction form
    827,812.80/1,241,719.20 = 764,827.20/x
  3. Step 3: Cross multiply
    827,812.80x = 1,241,719.20 × 764,827.20
  4. Step 4: Simplify right side
    827,812.80x = 949,700,618,922.24
  5. Step 5: Solve for x
    x = 949,700,618,922.24/827,812.80
  6. Step 6: Final answer
    x = 1,147,240.80

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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.