Home / 721,607,480.80-995,818,323.71-391,582,619.80

Finding the Fourth Proportional to 721,607,480.80, 995,818,323.71 and 391,582,619.80

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Solution

The fourth proportional to 721,607,480.80, 995,818,323.71 and 391,582,619.80 is: 540,384,015.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,607,480.80 : 995,818,323.71 = 391,582,619.80 : x
  2. Step 2: Convert to fraction form
    721,607,480.80/995,818,323.71 = 391,582,619.80/x
  3. Step 3: Cross multiply
    721,607,480.80x = 995,818,323.71 × 391,582,619.80
  4. Step 4: Simplify right side
    721,607,480.80x = 389,945,148,043,206,272
  5. Step 5: Solve for x
    x = 389,945,148,043,206,272/721,607,480.80
  6. Step 6: Final answer
    x = 540,384,015.44

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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.