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Finding the Fourth Proportional to 339,757.64, 509,697.98 and 139,967

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Solution

The fourth proportional to 339,757.64, 509,697.98 and 139,967 is: 209,975.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,757.64 : 509,697.98 = 139,967 : x
  2. Step 2: Convert to fraction form
    339,757.64/509,697.98 = 139,967/x
  3. Step 3: Cross multiply
    339,757.64x = 509,697.98 × 139,967
  4. Step 4: Simplify right side
    339,757.64x = 71,340,896,466.83
  5. Step 5: Solve for x
    x = 71,340,896,466.83/339,757.64
  6. Step 6: Final answer
    x = 209,975.84

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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.