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Finding the Fourth Proportional to 339,678.40, 509,522.40 and 129,327.84

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Solution

The fourth proportional to 339,678.40, 509,522.40 and 129,327.84 is: 193,993.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,678.40 : 509,522.40 = 129,327.84 : x
  2. Step 2: Convert to fraction form
    339,678.40/509,522.40 = 129,327.84/x
  3. Step 3: Cross multiply
    339,678.40x = 509,522.40 × 129,327.84
  4. Step 4: Simplify right side
    339,678.40x = 65,895,431,423.62
  5. Step 5: Solve for x
    x = 65,895,431,423.62/339,678.40
  6. Step 6: Final answer
    x = 193,993.59

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1.5x scale

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.