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Finding the Fourth Proportional to 307,226.20, 461,130.90 and 189,128.20

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Solution

The fourth proportional to 307,226.20, 461,130.90 and 189,128.20 is: 283,871.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,226.20 : 461,130.90 = 189,128.20 : x
  2. Step 2: Convert to fraction form
    307,226.20/461,130.90 = 189,128.20/x
  3. Step 3: Cross multiply
    307,226.20x = 461,130.90 × 189,128.20
  4. Step 4: Simplify right side
    307,226.20x = 87,212,857,081.38
  5. Step 5: Solve for x
    x = 87,212,857,081.38/307,226.20
  6. Step 6: Final answer
    x = 283,871.81

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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.