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Finding the Fourth Proportional to 279,834.85, 419,750.91 and 69,472.79

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Solution

The fourth proportional to 279,834.85, 419,750.91 and 69,472.79 is: 104,208.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,834.85 : 419,750.91 = 69,472.79 : x
  2. Step 2: Convert to fraction form
    279,834.85/419,750.91 = 69,472.79/x
  3. Step 3: Cross multiply
    279,834.85x = 419,750.91 × 69,472.79
  4. Step 4: Simplify right side
    279,834.85x = 29,161,266,298.05
  5. Step 5: Solve for x
    x = 29,161,266,298.05/279,834.85
  6. Step 6: Final answer
    x = 104,208.84

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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.