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Finding the Fourth Proportional to 1,388,235,825.54, 1,915,800,687.90 and 761,704,087.44

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Solution

The fourth proportional to 1,388,235,825.54, 1,915,800,687.90 and 761,704,087.44 is: 1,051,170,981.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,235,825.54 : 1,915,800,687.90 = 761,704,087.44 : x
  2. Step 2: Convert to fraction form
    1,388,235,825.54/1,915,800,687.90 = 761,704,087.44/x
  3. Step 3: Cross multiply
    1,388,235,825.54x = 1,915,800,687.90 × 761,704,087.44
  4. Step 4: Simplify right side
    1,388,235,825.54x = 1,459,273,214,693,794,048
  5. Step 5: Solve for x
    x = 1,459,273,214,693,794,048/1,388,235,825.54
  6. Step 6: Final answer
    x = 1,051,170,981.07

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1.5x scale

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.