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Finding the Fourth Proportional to 620,370.80, 930,556.20 and 221,024.60

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Solution

The fourth proportional to 620,370.80, 930,556.20 and 221,024.60 is: 331,536.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,370.80 : 930,556.20 = 221,024.60 : x
  2. Step 2: Convert to fraction form
    620,370.80/930,556.20 = 221,024.60/x
  3. Step 3: Cross multiply
    620,370.80x = 930,556.20 × 221,024.60
  4. Step 4: Simplify right side
    620,370.80x = 205,675,811,882.52
  5. Step 5: Solve for x
    x = 205,675,811,882.52/620,370.80
  6. Step 6: Final answer
    x = 331,536.90

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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.