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Finding the Fourth Proportional to 339,679.20, 508,935.60 and 221,289.60

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Solution

The fourth proportional to 339,679.20, 508,935.60 and 221,289.60 is: 331,554.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,679.20 : 508,935.60 = 221,289.60 : x
  2. Step 2: Convert to fraction form
    339,679.20/508,935.60 = 221,289.60/x
  3. Step 3: Cross multiply
    339,679.20x = 508,935.60 × 221,289.60
  4. Step 4: Simplify right side
    339,679.20x = 112,622,155,349.76
  5. Step 5: Solve for x
    x = 112,622,155,349.76/339,679.20
  6. Step 6: Final answer
    x = 331,554.46

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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.