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Finding the Fourth Proportional to 339,460.80, 509,061.60 and 102,724.80

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Solution

The fourth proportional to 339,460.80, 509,061.60 and 102,724.80 is: 154,047.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,460.80 : 509,061.60 = 102,724.80 : x
  2. Step 2: Convert to fraction form
    339,460.80/509,061.60 = 102,724.80/x
  3. Step 3: Cross multiply
    339,460.80x = 509,061.60 × 102,724.80
  4. Step 4: Simplify right side
    339,460.80x = 52,293,251,047.68
  5. Step 5: Solve for x
    x = 52,293,251,047.68/339,460.80
  6. Step 6: Final answer
    x = 154,047.98

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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.