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Finding the Fourth Proportional to 339,043.86, 508,730.94 and 139,424.22

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Solution

The fourth proportional to 339,043.86, 508,730.94 and 139,424.22 is: 209,204.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,043.86 : 508,730.94 = 139,424.22 : x
  2. Step 2: Convert to fraction form
    339,043.86/508,730.94 = 139,424.22/x
  3. Step 3: Cross multiply
    339,043.86x = 508,730.94 × 139,424.22
  4. Step 4: Simplify right side
    339,043.86x = 70,929,414,499.37
  5. Step 5: Solve for x
    x = 70,929,414,499.37/339,043.86
  6. Step 6: Final answer
    x = 209,204.24

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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.