Home / 339,621.40-509,432.10-308,128.60

Finding the Fourth Proportional to 339,621.40, 509,432.10 and 308,128.60

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Solution

The fourth proportional to 339,621.40, 509,432.10 and 308,128.60 is: 462,192.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,621.40 : 509,432.10 = 308,128.60 : x
  2. Step 2: Convert to fraction form
    339,621.40/509,432.10 = 308,128.60/x
  3. Step 3: Cross multiply
    339,621.40x = 509,432.10 × 308,128.60
  4. Step 4: Simplify right side
    339,621.40x = 156,970,599,768.06
  5. Step 5: Solve for x
    x = 156,970,599,768.06/339,621.40
  6. Step 6: Final answer
    x = 462,192.90

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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.