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Finding the Fourth Proportional to 620,556.30, 930,943.80 and 221,428.80

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Solution

The fourth proportional to 620,556.30, 930,943.80 and 221,428.80 is: 332,182.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,556.30 : 930,943.80 = 221,428.80 : x
  2. Step 2: Convert to fraction form
    620,556.30/930,943.80 = 221,428.80/x
  3. Step 3: Cross multiply
    620,556.30x = 930,943.80 × 221,428.80
  4. Step 4: Simplify right side
    620,556.30x = 206,137,768,501.44
  5. Step 5: Solve for x
    x = 206,137,768,501.44/620,556.30
  6. Step 6: Final answer
    x = 332,182.22

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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.