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Finding the Fourth Proportional to 1,330,496,028.80, 1,992,720,734.40 and 840,720,003.20

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Solution

The fourth proportional to 1,330,496,028.80, 1,992,720,734.40 and 840,720,003.20 is: 1,259,169,622.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330,496,028.80 : 1,992,720,734.40 = 840,720,003.20 : x
  2. Step 2: Convert to fraction form
    1,330,496,028.80/1,992,720,734.40 = 840,720,003.20/x
  3. Step 3: Cross multiply
    1,330,496,028.80x = 1,992,720,734.40 × 840,720,003.20
  4. Step 4: Simplify right side
    1,330,496,028.80x = 1,675,320,182,201,474,560
  5. Step 5: Solve for x
    x = 1,675,320,182,201,474,560/1,330,496,028.80
  6. Step 6: Final answer
    x = 1,259,169,622.41

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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.