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Finding the Fourth Proportional to 1,328,605,048.95, 1,992,907,573.43 and 775,339,538.55

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Solution

The fourth proportional to 1,328,605,048.95, 1,992,907,573.43 and 775,339,538.55 is: 1,163,009,307.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,605,048.95 : 1,992,907,573.43 = 775,339,538.55 : x
  2. Step 2: Convert to fraction form
    1,328,605,048.95/1,992,907,573.43 = 775,339,538.55/x
  3. Step 3: Cross multiply
    1,328,605,048.95x = 1,992,907,573.43 × 775,339,538.55
  4. Step 4: Simplify right side
    1,328,605,048.95x = 1,545,180,038,352,139,520
  5. Step 5: Solve for x
    x = 1,545,180,038,352,139,520/1,328,605,048.95
  6. Step 6: Final answer
    x = 1,163,009,307.83

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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.