Home / 409,299.86-612,816.18-209,189.36

Finding the Fourth Proportional to 409,299.86, 612,816.18 and 209,189.36

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Solution

The fourth proportional to 409,299.86, 612,816.18 and 209,189.36 is: 313,204.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,299.86 : 612,816.18 = 209,189.36 : x
  2. Step 2: Convert to fraction form
    409,299.86/612,816.18 = 209,189.36/x
  3. Step 3: Cross multiply
    409,299.86x = 612,816.18 × 209,189.36
  4. Step 4: Simplify right side
    409,299.86x = 128,194,624,491.85
  5. Step 5: Solve for x
    x = 128,194,624,491.85/409,299.86
  6. Step 6: Final answer
    x = 313,204.66

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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.