Home / 305,561.45-458,506.20-128,086.40

Finding the Fourth Proportional to 305,561.45, 458,506.20 and 128,086.40

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Solution

The fourth proportional to 305,561.45, 458,506.20 and 128,086.40 is: 192,198.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,561.45 : 458,506.20 = 128,086.40 : x
  2. Step 2: Convert to fraction form
    305,561.45/458,506.20 = 128,086.40/x
  3. Step 3: Cross multiply
    305,561.45x = 458,506.20 × 128,086.40
  4. Step 4: Simplify right side
    305,561.45x = 58,728,408,535.68
  5. Step 5: Solve for x
    x = 58,728,408,535.68/305,561.45
  6. Step 6: Final answer
    x = 192,198.36

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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.