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Finding the Fourth Proportional to 339,436.32, 509,220.03 and 129,057.90

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Solution

The fourth proportional to 339,436.32, 509,220.03 and 129,057.90 is: 193,611.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,436.32 : 509,220.03 = 129,057.90 : x
  2. Step 2: Convert to fraction form
    339,436.32/509,220.03 = 129,057.90/x
  3. Step 3: Cross multiply
    339,436.32x = 509,220.03 × 129,057.90
  4. Step 4: Simplify right side
    339,436.32x = 65,718,867,709.74
  5. Step 5: Solve for x
    x = 65,718,867,709.74/339,436.32
  6. Step 6: Final answer
    x = 193,611.77

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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.