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Finding the Fourth Proportional to 279,889.99, 419,834.89 and 90,378.23

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Solution

The fourth proportional to 279,889.99, 419,834.89 and 90,378.23 is: 135,567.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,889.99 : 419,834.89 = 90,378.23 : x
  2. Step 2: Convert to fraction form
    279,889.99/419,834.89 = 90,378.23/x
  3. Step 3: Cross multiply
    279,889.99x = 419,834.89 × 90,378.23
  4. Step 4: Simplify right side
    279,889.99x = 37,943,936,369.65
  5. Step 5: Solve for x
    x = 37,943,936,369.65/279,889.99
  6. Step 6: Final answer
    x = 135,567.32

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1.5x scale

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.