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Finding the Fourth Proportional to 339,661.55, 509,630.67 and 171,230.42

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Solution

The fourth proportional to 339,661.55, 509,630.67 and 171,230.42 is: 256,915.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,661.55 : 509,630.67 = 171,230.42 : x
  2. Step 2: Convert to fraction form
    339,661.55/509,630.67 = 171,230.42/x
  3. Step 3: Cross multiply
    339,661.55x = 509,630.67 × 171,230.42
  4. Step 4: Simplify right side
    339,661.55x = 87,264,274,943.06
  5. Step 5: Solve for x
    x = 87,264,274,943.06/339,661.55
  6. Step 6: Final answer
    x = 256,915.37

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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.