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Finding the Fourth Proportional to 1,388,945,315.93, 1,916,746,635.21 and 753,866,035.79

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Solution

The fourth proportional to 1,388,945,315.93, 1,916,746,635.21 and 753,866,035.79 is: 1,040,336,268.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,945,315.93 : 1,916,746,635.21 = 753,866,035.79 : x
  2. Step 2: Convert to fraction form
    1,388,945,315.93/1,916,746,635.21 = 753,866,035.79/x
  3. Step 3: Cross multiply
    1,388,945,315.93x = 1,916,746,635.21 × 753,866,035.79
  4. Step 4: Simplify right side
    1,388,945,315.93x = 1,444,970,187,499,584,000
  5. Step 5: Solve for x
    x = 1,444,970,187,499,584,000/1,388,945,315.93
  6. Step 6: Final answer
    x = 1,040,336,268.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.