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Finding the Fourth Proportional to 520,101.80, 779,720.70 and 220,812.20

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Solution

The fourth proportional to 520,101.80, 779,720.70 and 220,812.20 is: 331,034.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,101.80 : 779,720.70 = 220,812.20 : x
  2. Step 2: Convert to fraction form
    520,101.80/779,720.70 = 220,812.20/x
  3. Step 3: Cross multiply
    520,101.80x = 779,720.70 × 220,812.20
  4. Step 4: Simplify right side
    520,101.80x = 172,171,843,152.54
  5. Step 5: Solve for x
    x = 172,171,843,152.54/520,101.80
  6. Step 6: Final answer
    x = 331,034.89

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Similar ratio
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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.