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Finding the Fourth Proportional to 408,791.99, 613,193.45 and 128,309.24

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Solution

The fourth proportional to 408,791.99, 613,193.45 and 128,309.24 is: 192,465.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,791.99 : 613,193.45 = 128,309.24 : x
  2. Step 2: Convert to fraction form
    408,791.99/613,193.45 = 128,309.24/x
  3. Step 3: Cross multiply
    408,791.99x = 613,193.45 × 128,309.24
  4. Step 4: Simplify right side
    408,791.99x = 78,678,381,834.96
  5. Step 5: Solve for x
    x = 78,678,381,834.96/408,791.99
  6. Step 6: Final answer
    x = 192,465.57

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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.