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Finding the Fourth Proportional to 702,351,542.70, 969,174,491.88 and 389,027,215.14

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Solution

The fourth proportional to 702,351,542.70, 969,174,491.88 and 389,027,215.14 is: 536,818,431.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,351,542.70 : 969,174,491.88 = 389,027,215.14 : x
  2. Step 2: Convert to fraction form
    702,351,542.70/969,174,491.88 = 389,027,215.14/x
  3. Step 3: Cross multiply
    702,351,542.70x = 969,174,491.88 × 389,027,215.14
  4. Step 4: Simplify right side
    702,351,542.70x = 377,035,253,560,800,896
  5. Step 5: Solve for x
    x = 377,035,253,560,800,896/702,351,542.70
  6. Step 6: Final answer
    x = 536,818,431.57

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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.