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Finding the Fourth Proportional to 1,313,190, 1,812,202.20 and 709,578

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Solution

The fourth proportional to 1,313,190, 1,812,202.20 and 709,578 is: 979,217.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313,190 : 1,812,202.20 = 709,578 : x
  2. Step 2: Convert to fraction form
    1,313,190/1,812,202.20 = 709,578/x
  3. Step 3: Cross multiply
    1,313,190x = 1,812,202.20 × 709,578
  4. Step 4: Simplify right side
    1,313,190x = 1,285,898,812,671.60
  5. Step 5: Solve for x
    x = 1,285,898,812,671.60/1,313,190
  6. Step 6: Final answer
    x = 979,217.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.