Home / 1,213,428.70-1,820,143.05-1,189,809.10

Finding the Fourth Proportional to 1,213,428.70, 1,820,143.05 and 1,189,809.10

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Solution

The fourth proportional to 1,213,428.70, 1,820,143.05 and 1,189,809.10 is: 1,784,713.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213,428.70 : 1,820,143.05 = 1,189,809.10 : x
  2. Step 2: Convert to fraction form
    1,213,428.70/1,820,143.05 = 1,189,809.10/x
  3. Step 3: Cross multiply
    1,213,428.70x = 1,820,143.05 × 1,189,809.10
  4. Step 4: Simplify right side
    1,213,428.70x = 2,165,622,764,191.76
  5. Step 5: Solve for x
    x = 2,165,622,764,191.76/1,213,428.70
  6. Step 6: Final answer
    x = 1,784,713.65

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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.