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Finding the Fourth Proportional to 307,745.40, 461,909.70 and 263,422.20

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Solution

The fourth proportional to 307,745.40, 461,909.70 and 263,422.20 is: 395,382.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,745.40 : 461,909.70 = 263,422.20 : x
  2. Step 2: Convert to fraction form
    307,745.40/461,909.70 = 263,422.20/x
  3. Step 3: Cross multiply
    307,745.40x = 461,909.70 × 263,422.20
  4. Step 4: Simplify right side
    307,745.40x = 121,677,269,375.34
  5. Step 5: Solve for x
    x = 121,677,269,375.34/307,745.40
  6. Step 6: Final answer
    x = 395,382.90

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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.