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Finding the Fourth Proportional to 620,583,969.20, 930,801,304.20 and 257,040,417.20

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Solution

The fourth proportional to 620,583,969.20, 930,801,304.20 and 257,040,417.20 is: 385,529,706.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,583,969.20 : 930,801,304.20 = 257,040,417.20 : x
  2. Step 2: Convert to fraction form
    620,583,969.20/930,801,304.20 = 257,040,417.20/x
  3. Step 3: Cross multiply
    620,583,969.20x = 930,801,304.20 × 257,040,417.20
  4. Step 4: Simplify right side
    620,583,969.20x = 239,253,555,561,872,128
  5. Step 5: Solve for x
    x = 239,253,555,561,872,128/620,583,969.20
  6. Step 6: Final answer
    x = 385,529,706.59

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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.