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Finding the Fourth Proportional to 520,392.90, 780,591.78 and 220,798.20

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Solution

The fourth proportional to 520,392.90, 780,591.78 and 220,798.20 is: 331,198.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,392.90 : 780,591.78 = 220,798.20 : x
  2. Step 2: Convert to fraction form
    520,392.90/780,591.78 = 220,798.20/x
  3. Step 3: Cross multiply
    520,392.90x = 780,591.78 × 220,798.20
  4. Step 4: Simplify right side
    520,392.90x = 172,353,259,958.80
  5. Step 5: Solve for x
    x = 172,353,259,958.80/520,392.90
  6. Step 6: Final answer
    x = 331,198.33

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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.