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Finding the Fourth Proportional to 626,761,944.36, 864,019,905.57 and 438,004,205.10

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Solution

The fourth proportional to 626,761,944.36, 864,019,905.57 and 438,004,205.10 is: 603,808,759.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,761,944.36 : 864,019,905.57 = 438,004,205.10 : x
  2. Step 2: Convert to fraction form
    626,761,944.36/864,019,905.57 = 438,004,205.10/x
  3. Step 3: Cross multiply
    626,761,944.36x = 864,019,905.57 × 438,004,205.10
  4. Step 4: Simplify right side
    626,761,944.36x = 378,444,351,929,764,928
  5. Step 5: Solve for x
    x = 378,444,351,929,764,928/626,761,944.36
  6. Step 6: Final answer
    x = 603,808,759.19

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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.