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Finding the Fourth Proportional to 339,435.25, 509,218.44 and 129,056.83

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Solution

The fourth proportional to 339,435.25, 509,218.44 and 129,056.83 is: 193,610.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,435.25 : 509,218.44 = 129,056.83 : x
  2. Step 2: Convert to fraction form
    339,435.25/509,218.44 = 129,056.83/x
  3. Step 3: Cross multiply
    339,435.25x = 509,218.44 × 129,056.83
  4. Step 4: Simplify right side
    339,435.25x = 65,718,117,643.95
  5. Step 5: Solve for x
    x = 65,718,117,643.95/339,435.25
  6. Step 6: Final answer
    x = 193,610.17

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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.