Home / 1,285,279,988.68-1,773,723,799.38-728,344,517.32

Finding the Fourth Proportional to 1,285,279,988.68, 1,773,723,799.38 and 728,344,517.32

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Solution

The fourth proportional to 1,285,279,988.68, 1,773,723,799.38 and 728,344,517.32 is: 1,005,136,636.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,279,988.68 : 1,773,723,799.38 = 728,344,517.32 : x
  2. Step 2: Convert to fraction form
    1,285,279,988.68/1,773,723,799.38 = 728,344,517.32/x
  3. Step 3: Cross multiply
    1,285,279,988.68x = 1,773,723,799.38 × 728,344,517.32
  4. Step 4: Simplify right side
    1,285,279,988.68x = 1,291,882,004,518,422,784
  5. Step 5: Solve for x
    x = 1,291,882,004,518,422,784/1,285,279,988.68
  6. Step 6: Final answer
    x = 1,005,136,636.29

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Double scale
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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.