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Finding the Fourth Proportional to 339,369.93, 508,859.85 and 139,828.05

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Solution

The fourth proportional to 339,369.93, 508,859.85 and 139,828.05 is: 209,661.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,369.93 : 508,859.85 = 139,828.05 : x
  2. Step 2: Convert to fraction form
    339,369.93/508,859.85 = 139,828.05/x
  3. Step 3: Cross multiply
    339,369.93x = 508,859.85 × 139,828.05
  4. Step 4: Simplify right side
    339,369.93x = 71,152,880,548.79
  5. Step 5: Solve for x
    x = 71,152,880,548.79/339,369.93
  6. Step 6: Final answer
    x = 209,661.71

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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.