Home / 419,919.39-629,749.89-120,319.70

Finding the Fourth Proportional to 419,919.39, 629,749.89 and 120,319.70

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Solution

The fourth proportional to 419,919.39, 629,749.89 and 120,319.70 is: 180,442.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,919.39 : 629,749.89 = 120,319.70 : x
  2. Step 2: Convert to fraction form
    419,919.39/629,749.89 = 120,319.70/x
  3. Step 3: Cross multiply
    419,919.39x = 629,749.89 × 120,319.70
  4. Step 4: Simplify right side
    419,919.39x = 75,771,314,691.08
  5. Step 5: Solve for x
    x = 75,771,314,691.08/419,919.39
  6. Step 6: Final answer
    x = 180,442.52

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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.