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Finding the Fourth Proportional to 309,425.98, 463,419.26 and 300,912.40

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Solution

The fourth proportional to 309,425.98, 463,419.26 and 300,912.40 is: 450,668.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,425.98 : 463,419.26 = 300,912.40 : x
  2. Step 2: Convert to fraction form
    309,425.98/463,419.26 = 300,912.40/x
  3. Step 3: Cross multiply
    309,425.98x = 463,419.26 × 300,912.40
  4. Step 4: Simplify right side
    309,425.98x = 139,448,601,732.82
  5. Step 5: Solve for x
    x = 139,448,601,732.82/309,425.98
  6. Step 6: Final answer
    x = 450,668.69

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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.