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Finding the Fourth Proportional to 3,980,640.78, 5,962,209.06 and 3,289,697.01

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Solution

The fourth proportional to 3,980,640.78, 5,962,209.06 and 3,289,697.01 is: 4,927,312.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980,640.78 : 5,962,209.06 = 3,289,697.01 : x
  2. Step 2: Convert to fraction form
    3,980,640.78/5,962,209.06 = 3,289,697.01/x
  3. Step 3: Cross multiply
    3,980,640.78x = 5,962,209.06 × 3,289,697.01
  4. Step 4: Simplify right side
    3,980,640.78x = 19,613,861,317,676.91
  5. Step 5: Solve for x
    x = 19,613,861,317,676.91/3,980,640.78
  6. Step 6: Final answer
    x = 4,927,312.56

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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.