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Finding the Fourth Proportional to 339,394.94, 509,089.50 and 136,987.94

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Solution

The fourth proportional to 339,394.94, 509,089.50 and 136,987.94 is: 205,480.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,394.94 : 509,089.50 = 136,987.94 : x
  2. Step 2: Convert to fraction form
    339,394.94/509,089.50 = 136,987.94/x
  3. Step 3: Cross multiply
    339,394.94x = 509,089.50 × 136,987.94
  4. Step 4: Simplify right side
    339,394.94x = 69,739,121,880.63
  5. Step 5: Solve for x
    x = 69,739,121,880.63/339,394.94
  6. Step 6: Final answer
    x = 205,480.74

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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.