Home / 1,389,962,908.13-1,918,186,271.37-817,785,900.56

Finding the Fourth Proportional to 1,389,962,908.13, 1,918,186,271.37 and 817,785,900.56

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Solution

The fourth proportional to 1,389,962,908.13, 1,918,186,271.37 and 817,785,900.56 is: 1,128,566,581.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,962,908.13 : 1,918,186,271.37 = 817,785,900.56 : x
  2. Step 2: Convert to fraction form
    1,389,962,908.13/1,918,186,271.37 = 817,785,900.56/x
  3. Step 3: Cross multiply
    1,389,962,908.13x = 1,918,186,271.37 × 817,785,900.56
  4. Step 4: Simplify right side
    1,389,962,908.13x = 1,568,665,687,378,939,392
  5. Step 5: Solve for x
    x = 1,568,665,687,378,939,392/1,389,962,908.13
  6. Step 6: Final answer
    x = 1,128,566,581.32

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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.