Finding the Fourth Proportional to 1,988,215,399.74, 2,743,740,274.96 and 1,108,130,208.06
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Solution
The fourth proportional to 1,988,215,399.74, 2,743,740,274.96 and 1,108,130,208.06 is: 1,529,221,372.17
Step by Step Solution
- Step 1: Write the proportion equation
1,988,215,399.74 : 2,743,740,274.96 = 1,108,130,208.06 : x - Step 2: Convert to fraction form
1,988,215,399.74/2,743,740,274.96 = 1,108,130,208.06/x - Step 3: Cross multiply
1,988,215,399.74x = 2,743,740,274.96 × 1,108,130,208.06 - Step 4: Simplify right side
1,988,215,399.74x = 3,040,421,481,754,026,496 - Step 5: Solve for x
x = 3,040,421,481,754,026,496/1,988,215,399.74 - Step 6: Final answer
x = 1,529,221,372.17
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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.