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Finding the Fourth Proportional to 445,650.72, 668,696.58 and 209,011.56

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Solution

The fourth proportional to 445,650.72, 668,696.58 and 209,011.56 is: 313,620.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,650.72 : 668,696.58 = 209,011.56 : x
  2. Step 2: Convert to fraction form
    445,650.72/668,696.58 = 209,011.56/x
  3. Step 3: Cross multiply
    445,650.72x = 668,696.58 × 209,011.56
  4. Step 4: Simplify right side
    445,650.72x = 139,765,315,352.47
  5. Step 5: Solve for x
    x = 139,765,315,352.47/445,650.72
  6. Step 6: Final answer
    x = 313,620.76

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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.