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Finding the Fourth Proportional to 512,518.80, 768,778.20 and 370,801.20

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Solution

The fourth proportional to 512,518.80, 768,778.20 and 370,801.20 is: 556,201.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,518.80 : 768,778.20 = 370,801.20 : x
  2. Step 2: Convert to fraction form
    512,518.80/768,778.20 = 370,801.20/x
  3. Step 3: Cross multiply
    512,518.80x = 768,778.20 × 370,801.20
  4. Step 4: Simplify right side
    512,518.80x = 285,063,879,093.84
  5. Step 5: Solve for x
    x = 285,063,879,093.84/512,518.80
  6. Step 6: Final answer
    x = 556,201.80

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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.