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Finding the Fourth Proportional to 339,690.99, 509,538.65 and 99,803.90

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Solution

The fourth proportional to 339,690.99, 509,538.65 and 99,803.90 is: 149,706.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,690.99 : 509,538.65 = 99,803.90 : x
  2. Step 2: Convert to fraction form
    339,690.99/509,538.65 = 99,803.90/x
  3. Step 3: Cross multiply
    339,690.99x = 509,538.65 × 99,803.90
  4. Step 4: Simplify right side
    339,690.99x = 50,853,942,940.80
  5. Step 5: Solve for x
    x = 50,853,942,940.80/339,690.99
  6. Step 6: Final answer
    x = 149,706.48

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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.