Home / 643,659,349.60-965,489,024.40-212,837,845.60

Finding the Fourth Proportional to 643,659,349.60, 965,489,024.40 and 212,837,845.60

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Solution

The fourth proportional to 643,659,349.60, 965,489,024.40 and 212,837,845.60 is: 319,256,768.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,659,349.60 : 965,489,024.40 = 212,837,845.60 : x
  2. Step 2: Convert to fraction form
    643,659,349.60/965,489,024.40 = 212,837,845.60/x
  3. Step 3: Cross multiply
    643,659,349.60x = 965,489,024.40 × 212,837,845.60
  4. Step 4: Simplify right side
    643,659,349.60x = 205,492,603,903,741,824
  5. Step 5: Solve for x
    x = 205,492,603,903,741,824/643,659,349.60
  6. Step 6: Final answer
    x = 319,256,768.40

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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.