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Finding the Fourth Proportional to 339,713.20, 508,986.60 and 221,323.60

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Solution

The fourth proportional to 339,713.20, 508,986.60 and 221,323.60 is: 331,605.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,713.20 : 508,986.60 = 221,323.60 : x
  2. Step 2: Convert to fraction form
    339,713.20/508,986.60 = 221,323.60/x
  3. Step 3: Cross multiply
    339,713.20x = 508,986.60 × 221,323.60
  4. Step 4: Simplify right side
    339,713.20x = 112,650,746,663.76
  5. Step 5: Solve for x
    x = 112,650,746,663.76/339,713.20
  6. Step 6: Final answer
    x = 331,605.44

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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.