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Finding the Fourth Proportional to 702,615,665.68, 969,615,357.47 and 389,355,109.81

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Solution

The fourth proportional to 702,615,665.68, 969,615,357.47 and 389,355,109.81 is: 537,313,231.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,615,665.68 : 969,615,357.47 = 389,355,109.81 : x
  2. Step 2: Convert to fraction form
    702,615,665.68/969,615,357.47 = 389,355,109.81/x
  3. Step 3: Cross multiply
    702,615,665.68x = 969,615,357.47 × 389,355,109.81
  4. Step 4: Simplify right side
    702,615,665.68x = 377,524,693,978,283,520
  5. Step 5: Solve for x
    x = 377,524,693,978,283,520/702,615,665.68
  6. Step 6: Final answer
    x = 537,313,231.71

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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.