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Finding the Fourth Proportional to 505,401.94, 758,099.84 and 126,320.78

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Solution

The fourth proportional to 505,401.94, 758,099.84 and 126,320.78 is: 189,480.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,401.94 : 758,099.84 = 126,320.78 : x
  2. Step 2: Convert to fraction form
    505,401.94/758,099.84 = 126,320.78/x
  3. Step 3: Cross multiply
    505,401.94x = 758,099.84 × 126,320.78
  4. Step 4: Simplify right side
    505,401.94x = 95,763,763,106.68
  5. Step 5: Solve for x
    x = 95,763,763,106.68/505,401.94
  6. Step 6: Final answer
    x = 189,480.40

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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.