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Finding the Fourth Proportional to 698,544,004.20, 979,394,878.20 and 698,544,004.20

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Solution

The fourth proportional to 698,544,004.20, 979,394,878.20 and 698,544,004.20 is: 979,394,878.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,544,004.20 : 979,394,878.20 = 698,544,004.20 : x
  2. Step 2: Convert to fraction form
    698,544,004.20/979,394,878.20 = 698,544,004.20/x
  3. Step 3: Cross multiply
    698,544,004.20x = 979,394,878.20 × 698,544,004.20
  4. Step 4: Simplify right side
    698,544,004.20x = 684,150,419,910,799,360
  5. Step 5: Solve for x
    x = 684,150,419,910,799,360/698,544,004.20
  6. Step 6: Final answer
    x = 979,394,878.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.