Finding the Fourth Proportional to 1,042,939,431.44, 1,564,409,707.92 and 387,805,331.09
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Solution
The fourth proportional to 1,042,939,431.44, 1,564,409,707.92 and 387,805,331.09 is: 581,708,205.15
Step by Step Solution
- Step 1: Write the proportion equation
1,042,939,431.44 : 1,564,409,707.92 = 387,805,331.09 : x - Step 2: Convert to fraction form
1,042,939,431.44/1,564,409,707.92 = 387,805,331.09/x - Step 3: Cross multiply
1,042,939,431.44x = 1,564,409,707.92 × 387,805,331.09 - Step 4: Simplify right side
1,042,939,431.44x = 606,686,424,740,325,760 - Step 5: Solve for x
x = 606,686,424,740,325,760/1,042,939,431.44 - Step 6: Final answer
x = 581,708,205.15
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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.