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Finding the Fourth Proportional to 255,958.21, 383,993.34 and 78,479.07

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Solution

The fourth proportional to 255,958.21, 383,993.34 and 78,479.07 is: 117,735.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,958.21 : 383,993.34 = 78,479.07 : x
  2. Step 2: Convert to fraction form
    255,958.21/383,993.34 = 78,479.07/x
  3. Step 3: Cross multiply
    255,958.21x = 383,993.34 × 78,479.07
  4. Step 4: Simplify right side
    255,958.21x = 30,135,440,209.39
  5. Step 5: Solve for x
    x = 30,135,440,209.39/255,958.21
  6. Step 6: Final answer
    x = 117,735.78

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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.