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Finding the Fourth Proportional to 307,690.40, 461,583.12 and 130,198.40

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Solution

The fourth proportional to 307,690.40, 461,583.12 and 130,198.40 is: 195,317.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,690.40 : 461,583.12 = 130,198.40 : x
  2. Step 2: Convert to fraction form
    307,690.40/461,583.12 = 130,198.40/x
  3. Step 3: Cross multiply
    307,690.40x = 461,583.12 × 130,198.40
  4. Step 4: Simplify right side
    307,690.40x = 60,097,383,691.01
  5. Step 5: Solve for x
    x = 60,097,383,691.01/307,690.40
  6. Step 6: Final answer
    x = 195,317.71

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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.