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Finding the Fourth Proportional to 339,433.88, 509,216.38 and 129,055.46

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Solution

The fourth proportional to 339,433.88, 509,216.38 and 129,055.46 is: 193,608.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,433.88 : 509,216.38 = 129,055.46 : x
  2. Step 2: Convert to fraction form
    339,433.88/509,216.38 = 129,055.46/x
  3. Step 3: Cross multiply
    339,433.88x = 509,216.38 × 129,055.46
  4. Step 4: Simplify right side
    339,433.88x = 65,717,151,291.71
  5. Step 5: Solve for x
    x = 65,717,151,291.71/339,433.88
  6. Step 6: Final answer
    x = 193,608.11

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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.