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Finding the Fourth Proportional to 520,100.80, 779,719.20 and 220,811.20

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Solution

The fourth proportional to 520,100.80, 779,719.20 and 220,811.20 is: 331,033.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,100.80 : 779,719.20 = 220,811.20 : x
  2. Step 2: Convert to fraction form
    520,100.80/779,719.20 = 220,811.20/x
  3. Step 3: Cross multiply
    520,100.80x = 779,719.20 × 220,811.20
  4. Step 4: Simplify right side
    520,100.80x = 172,170,732,215.04
  5. Step 5: Solve for x
    x = 172,170,732,215.04/520,100.80
  6. Step 6: Final answer
    x = 331,033.39

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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.