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Finding the Fourth Proportional to 512,572.80, 768,859.20 and 370,855.20

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Solution

The fourth proportional to 512,572.80, 768,859.20 and 370,855.20 is: 556,282.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,572.80 : 768,859.20 = 370,855.20 : x
  2. Step 2: Convert to fraction form
    512,572.80/768,859.20 = 370,855.20/x
  3. Step 3: Cross multiply
    512,572.80x = 768,859.20 × 370,855.20
  4. Step 4: Simplify right side
    512,572.80x = 285,135,432,387.84
  5. Step 5: Solve for x
    x = 285,135,432,387.84/512,572.80
  6. Step 6: Final answer
    x = 556,282.80

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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.