Home / 1,389,962,889.21-1,918,186,245.27-817,785,881.69

Finding the Fourth Proportional to 1,389,962,889.21, 1,918,186,245.27 and 817,785,881.69

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Solution

The fourth proportional to 1,389,962,889.21, 1,918,186,245.27 and 817,785,881.69 is: 1,128,566,555.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,962,889.21 : 1,918,186,245.27 = 817,785,881.69 : x
  2. Step 2: Convert to fraction form
    1,389,962,889.21/1,918,186,245.27 = 817,785,881.69/x
  3. Step 3: Cross multiply
    1,389,962,889.21x = 1,918,186,245.27 × 817,785,881.69
  4. Step 4: Simplify right side
    1,389,962,889.21x = 1,568,665,629,824,166,400
  5. Step 5: Solve for x
    x = 1,568,665,629,824,166,400/1,389,962,889.21
  6. Step 6: Final answer
    x = 1,128,566,555.27

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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.