Home / 790,811,914.92-1,091,320,418.97-438,387,012.60

Finding the Fourth Proportional to 790,811,914.92, 1,091,320,418.97 and 438,387,012.60

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Solution

The fourth proportional to 790,811,914.92, 1,091,320,418.97 and 438,387,012.60 is: 604,974,064.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    790,811,914.92 : 1,091,320,418.97 = 438,387,012.60 : x
  2. Step 2: Convert to fraction form
    790,811,914.92/1,091,320,418.97 = 438,387,012.60/x
  3. Step 3: Cross multiply
    790,811,914.92x = 1,091,320,418.97 × 438,387,012.60
  4. Step 4: Simplify right side
    790,811,914.92x = 478,420,698,261,638,720
  5. Step 5: Solve for x
    x = 478,420,698,261,638,720/790,811,914.92
  6. Step 6: Final answer
    x = 604,974,064.29

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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.