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Finding the Fourth Proportional to 520,076.80, 779,500.80 and 220,556.80

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Solution

The fourth proportional to 520,076.80, 779,500.80 and 220,556.80 is: 330,574.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,076.80 : 779,500.80 = 220,556.80 : x
  2. Step 2: Convert to fraction form
    520,076.80/779,500.80 = 220,556.80/x
  3. Step 3: Cross multiply
    520,076.80x = 779,500.80 × 220,556.80
  4. Step 4: Simplify right side
    520,076.80x = 171,924,202,045.44
  5. Step 5: Solve for x
    x = 171,924,202,045.44/520,076.80
  6. Step 6: Final answer
    x = 330,574.64

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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.