Home / 680,254,345.39-938,691,112.35-378,816,884.05

Finding the Fourth Proportional to 680,254,345.39, 938,691,112.35 and 378,816,884.05

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Solution

The fourth proportional to 680,254,345.39, 938,691,112.35 and 378,816,884.05 is: 522,733,951.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,254,345.39 : 938,691,112.35 = 378,816,884.05 : x
  2. Step 2: Convert to fraction form
    680,254,345.39/938,691,112.35 = 378,816,884.05/x
  3. Step 3: Cross multiply
    680,254,345.39x = 938,691,112.35 × 378,816,884.05
  4. Step 4: Simplify right side
    680,254,345.39x = 355,592,042,265,855,488
  5. Step 5: Solve for x
    x = 355,592,042,265,855,488/680,254,345.39
  6. Step 6: Final answer
    x = 522,733,951.90

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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.