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Finding the Fourth Proportional to 339,416.25, 509,189.88 and 129,037.80

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Solution

The fourth proportional to 339,416.25, 509,189.88 and 129,037.80 is: 193,581.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,416.25 : 509,189.88 = 129,037.80 : x
  2. Step 2: Convert to fraction form
    339,416.25/509,189.88 = 129,037.80/x
  3. Step 3: Cross multiply
    339,416.25x = 509,189.88 × 129,037.80
  4. Step 4: Simplify right side
    339,416.25x = 65,704,741,897.46
  5. Step 5: Solve for x
    x = 65,704,741,897.46/339,416.25
  6. Step 6: Final answer
    x = 193,581.60

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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.