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Finding the Fourth Proportional to 339,296.80, 508,621.20 and 126,007.60

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Solution

The fourth proportional to 339,296.80, 508,621.20 and 126,007.60 is: 188,891.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,296.80 : 508,621.20 = 126,007.60 : x
  2. Step 2: Convert to fraction form
    339,296.80/508,621.20 = 126,007.60/x
  3. Step 3: Cross multiply
    339,296.80x = 508,621.20 × 126,007.60
  4. Step 4: Simplify right side
    339,296.80x = 64,090,136,721.12
  5. Step 5: Solve for x
    x = 64,090,136,721.12/339,296.80
  6. Step 6: Final answer
    x = 188,891.07

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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.