Home / 809,858,976.72-1,216,726,457.40-519,295,379.28

Finding the Fourth Proportional to 809,858,976.72, 1,216,726,457.40 and 519,295,379.28

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Solution

The fourth proportional to 809,858,976.72, 1,216,726,457.40 and 519,295,379.28 is: 780,185,742.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,858,976.72 : 1,216,726,457.40 = 519,295,379.28 : x
  2. Step 2: Convert to fraction form
    809,858,976.72/1,216,726,457.40 = 519,295,379.28/x
  3. Step 3: Cross multiply
    809,858,976.72x = 1,216,726,457.40 × 519,295,379.28
  4. Step 4: Simplify right side
    809,858,976.72x = 631,840,427,175,543,808
  5. Step 5: Solve for x
    x = 631,840,427,175,543,808/809,858,976.72
  6. Step 6: Final answer
    x = 780,185,742.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.