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Finding the Fourth Proportional to 339,998.20, 509,975.43 and 103,342.93

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Solution

The fourth proportional to 339,998.20, 509,975.43 and 103,342.93 is: 155,007.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,998.20 : 509,975.43 = 103,342.93 : x
  2. Step 2: Convert to fraction form
    339,998.20/509,975.43 = 103,342.93/x
  3. Step 3: Cross multiply
    339,998.20x = 509,975.43 × 103,342.93
  4. Step 4: Simplify right side
    339,998.20x = 52,702,355,164.21
  5. Step 5: Solve for x
    x = 52,702,355,164.21/339,998.20
  6. Step 6: Final answer
    x = 155,007.75

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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.