Home / 640,691,453.40-884,220,104.64-389,813,655.84

Finding the Fourth Proportional to 640,691,453.40, 884,220,104.64 and 389,813,655.84

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Solution

The fourth proportional to 640,691,453.40, 884,220,104.64 and 389,813,655.84 is: 537,982,939.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,691,453.40 : 884,220,104.64 = 389,813,655.84 : x
  2. Step 2: Convert to fraction form
    640,691,453.40/884,220,104.64 = 389,813,655.84/x
  3. Step 3: Cross multiply
    640,691,453.40x = 884,220,104.64 × 389,813,655.84
  4. Step 4: Simplify right side
    640,691,453.40x = 344,681,071,556,945,728
  5. Step 5: Solve for x
    x = 344,681,071,556,945,728/640,691,453.40
  6. Step 6: Final answer
    x = 537,982,939.73

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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.