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Finding the Fourth Proportional to 620,556,936.20, 930,835,404.30 and 436,890,926.60

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Solution

The fourth proportional to 620,556,936.20, 930,835,404.30 and 436,890,926.60 is: 655,336,389.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,556,936.20 : 930,835,404.30 = 436,890,926.60 : x
  2. Step 2: Convert to fraction form
    620,556,936.20/930,835,404.30 = 436,890,926.60/x
  3. Step 3: Cross multiply
    620,556,936.20x = 930,835,404.30 × 436,890,926.60
  4. Step 4: Simplify right side
    620,556,936.20x = 406,673,542,296,712,640
  5. Step 5: Solve for x
    x = 406,673,542,296,712,640/620,556,936.20
  6. Step 6: Final answer
    x = 655,336,389.90

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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.