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Finding the Fourth Proportional to 520,446.86, 780,891.72 and 220,991.88

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Solution

The fourth proportional to 520,446.86, 780,891.72 and 220,991.88 is: 331,581.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,446.86 : 780,891.72 = 220,991.88 : x
  2. Step 2: Convert to fraction form
    520,446.86/780,891.72 = 220,991.88/x
  3. Step 3: Cross multiply
    520,446.86x = 780,891.72 × 220,991.88
  4. Step 4: Simplify right side
    520,446.86x = 172,570,729,279.23
  5. Step 5: Solve for x
    x = 172,570,729,279.23/520,446.86
  6. Step 6: Final answer
    x = 331,581.84

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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.