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Finding the Fourth Proportional to 680,662.13, 939,313.73 and 378,849.65

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Solution

The fourth proportional to 680,662.13, 939,313.73 and 378,849.65 is: 522,812.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,662.13 : 939,313.73 = 378,849.65 : x
  2. Step 2: Convert to fraction form
    680,662.13/939,313.73 = 378,849.65/x
  3. Step 3: Cross multiply
    680,662.13x = 939,313.73 × 378,849.65
  4. Step 4: Simplify right side
    680,662.13x = 355,858,674,101.25
  5. Step 5: Solve for x
    x = 355,858,674,101.25/680,662.13
  6. Step 6: Final answer
    x = 522,812.51

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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.