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Finding the Fourth Proportional to 445,739.79, 668,609.61 and 209,082.47

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Solution

The fourth proportional to 445,739.79, 668,609.61 and 209,082.47 is: 313,623.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,739.79 : 668,609.61 = 209,082.47 : x
  2. Step 2: Convert to fraction form
    445,739.79/668,609.61 = 209,082.47/x
  3. Step 3: Cross multiply
    445,739.79x = 668,609.61 × 209,082.47
  4. Step 4: Simplify right side
    445,739.79x = 139,794,546,361.56
  5. Step 5: Solve for x
    x = 139,794,546,361.56/445,739.79
  6. Step 6: Final answer
    x = 313,623.67

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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.