Finding the Fourth Proportional to 1,237,643,331.84, 1,707,980,109.12 and 680,740,990.56
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Solution
The fourth proportional to 1,237,643,331.84, 1,707,980,109.12 and 680,740,990.56 is: 939,440,339.09
Step by Step Solution
- Step 1: Write the proportion equation
1,237,643,331.84 : 1,707,980,109.12 = 680,740,990.56 : x - Step 2: Convert to fraction form
1,237,643,331.84/1,707,980,109.12 = 680,740,990.56/x - Step 3: Cross multiply
1,237,643,331.84x = 1,707,980,109.12 × 680,740,990.56 - Step 4: Simplify right side
1,237,643,331.84x = 1,162,692,071,339,125,504 - Step 5: Solve for x
x = 1,162,692,071,339,125,504/1,237,643,331.84 - Step 6: Final answer
x = 939,440,339.09
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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.