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Finding the Fourth Proportional to 520,063.80, 779,481.30 and 220,543.80

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Solution

The fourth proportional to 520,063.80, 779,481.30 and 220,543.80 is: 330,555.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,063.80 : 779,481.30 = 220,543.80 : x
  2. Step 2: Convert to fraction form
    520,063.80/779,481.30 = 220,543.80/x
  3. Step 3: Cross multiply
    520,063.80x = 779,481.30 × 220,543.80
  4. Step 4: Simplify right side
    520,063.80x = 171,909,767,930.94
  5. Step 5: Solve for x
    x = 171,909,767,930.94/520,063.80
  6. Step 6: Final answer
    x = 330,555.15

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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.