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Finding the Fourth Proportional to 339,440.46, 508,965.57 and 139,898.58

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Solution

The fourth proportional to 339,440.46, 508,965.57 and 139,898.58 is: 209,767.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,440.46 : 508,965.57 = 139,898.58 : x
  2. Step 2: Convert to fraction form
    339,440.46/508,965.57 = 139,898.58/x
  3. Step 3: Cross multiply
    339,440.46x = 508,965.57 × 139,898.58
  4. Step 4: Simplify right side
    339,440.46x = 71,203,560,511.89
  5. Step 5: Solve for x
    x = 71,203,560,511.89/339,440.46
  6. Step 6: Final answer
    x = 209,767.45

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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.