Finding the Fourth Proportional to 1,189,486,595.54, 1,641,395,266.19 and 687,727,571.84
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Solution
The fourth proportional to 1,189,486,595.54, 1,641,395,266.19 and 687,727,571.84 is: 949,008,408.40
Step by Step Solution
- Step 1: Write the proportion equation
1,189,486,595.54 : 1,641,395,266.19 = 687,727,571.84 : x - Step 2: Convert to fraction form
1,189,486,595.54/1,641,395,266.19 = 687,727,571.84/x - Step 3: Cross multiply
1,189,486,595.54x = 1,641,395,266.19 × 687,727,571.84 - Step 4: Simplify right side
1,189,486,595.54x = 1,128,832,780,843,642,240 - Step 5: Solve for x
x = 1,128,832,780,843,642,240/1,189,486,595.54 - Step 6: Final answer
x = 949,008,408.40
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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.