Home / 1,222,816,159.21-1,687,262,137.55-721,181,913.43

Finding the Fourth Proportional to 1,222,816,159.21, 1,687,262,137.55 and 721,181,913.43

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Solution

The fourth proportional to 1,222,816,159.21, 1,687,262,137.55 and 721,181,913.43 is: 995,098,836.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,816,159.21 : 1,687,262,137.55 = 721,181,913.43 : x
  2. Step 2: Convert to fraction form
    1,222,816,159.21/1,687,262,137.55 = 721,181,913.43/x
  3. Step 3: Cross multiply
    1,222,816,159.21x = 1,687,262,137.55 × 721,181,913.43
  4. Step 4: Simplify right side
    1,222,816,159.21x = 1,216,822,936,816,300,800
  5. Step 5: Solve for x
    x = 1,216,822,936,816,300,800/1,222,816,159.21
  6. Step 6: Final answer
    x = 995,098,836.12

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Double scale
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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.