Home / 640,910,977.40-961,355,960.40-204,205,729.16

Finding the Fourth Proportional to 640,910,977.40, 961,355,960.40 and 204,205,729.16

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Solution

The fourth proportional to 640,910,977.40, 961,355,960.40 and 204,205,729.16 is: 306,305,246.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,910,977.40 : 961,355,960.40 = 204,205,729.16 : x
  2. Step 2: Convert to fraction form
    640,910,977.40/961,355,960.40 = 204,205,729.16/x
  3. Step 3: Cross multiply
    640,910,977.40x = 961,355,960.40 × 204,205,729.16
  4. Step 4: Simplify right side
    640,910,977.40x = 196,314,394,875,794,080
  5. Step 5: Solve for x
    x = 196,314,394,875,794,080/640,910,977.40
  6. Step 6: Final answer
    x = 306,305,246.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.