Finding the Fourth Proportional to 1,917,249,749.20, 2,875,874,623.80 and 987,440,575.60
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Solution
The fourth proportional to 1,917,249,749.20, 2,875,874,623.80 and 987,440,575.60 is: 1,481,160,863.40
Step by Step Solution
- Step 1: Write the proportion equation
1,917,249,749.20 : 2,875,874,623.80 = 987,440,575.60 : x - Step 2: Convert to fraction form
1,917,249,749.20/2,875,874,623.80 = 987,440,575.60/x - Step 3: Cross multiply
1,917,249,749.20x = 2,875,874,623.80 × 987,440,575.60 - Step 4: Simplify right side
1,917,249,749.20x = 2,839,755,293,878,505,472 - Step 5: Solve for x
x = 2,839,755,293,878,505,472/1,917,249,749.20 - Step 6: Final answer
x = 1,481,160,863.40
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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.