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Finding the Fourth Proportional to 339,709.40, 509,499.30 and 103,059.80

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Solution

The fourth proportional to 339,709.40, 509,499.30 and 103,059.80 is: 154,570.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,709.40 : 509,499.30 = 103,059.80 : x
  2. Step 2: Convert to fraction form
    339,709.40/509,499.30 = 103,059.80/x
  3. Step 3: Cross multiply
    339,709.40x = 509,499.30 × 103,059.80
  4. Step 4: Simplify right side
    339,709.40x = 52,508,895,958.14
  5. Step 5: Solve for x
    x = 52,508,895,958.14/339,709.40
  6. Step 6: Final answer
    x = 154,570.04

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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.