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Finding the Fourth Proportional to 408,737.34, 613,131.93 and 128,265.66

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Solution

The fourth proportional to 408,737.34, 613,131.93 and 128,265.66 is: 192,406.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,737.34 : 613,131.93 = 128,265.66 : x
  2. Step 2: Convert to fraction form
    408,737.34/613,131.93 = 128,265.66/x
  3. Step 3: Cross multiply
    408,737.34x = 613,131.93 × 128,265.66
  4. Step 4: Simplify right side
    408,737.34x = 78,643,771,668.52
  5. Step 5: Solve for x
    x = 78,643,771,668.52/408,737.34
  6. Step 6: Final answer
    x = 192,406.62

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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.