Finding the Fourth Proportional to 1,247,562,819.72, 1,721,568,484.68 and 682,938,474.09
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Solution
The fourth proportional to 1,247,562,819.72, 1,721,568,484.68 and 682,938,474.09 is: 942,417,756.75
Step by Step Solution
- Step 1: Write the proportion equation
1,247,562,819.72 : 1,721,568,484.68 = 682,938,474.09 : x - Step 2: Convert to fraction form
1,247,562,819.72/1,721,568,484.68 = 682,938,474.09/x - Step 3: Cross multiply
1,247,562,819.72x = 1,721,568,484.68 × 682,938,474.09 - Step 4: Simplify right side
1,247,562,819.72x = 1,175,725,353,968,792,832 - Step 5: Solve for x
x = 1,175,725,353,968,792,832/1,247,562,819.72 - Step 6: Final answer
x = 942,417,756.75
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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.