Finding the Fourth Proportional to 1,440,400,754.31, 1,987,755,057.95 and 780,351,032.31
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Solution
The fourth proportional to 1,440,400,754.31, 1,987,755,057.95 and 780,351,032.31 is: 1,076,885,517.32
Step by Step Solution
- Step 1: Write the proportion equation
1,440,400,754.31 : 1,987,755,057.95 = 780,351,032.31 : x - Step 2: Convert to fraction form
1,440,400,754.31/1,987,755,057.95 = 780,351,032.31/x - Step 3: Cross multiply
1,440,400,754.31x = 1,987,755,057.95 × 780,351,032.31 - Step 4: Simplify right side
1,440,400,754.31x = 1,551,146,711,446,804,480 - Step 5: Solve for x
x = 1,551,146,711,446,804,480/1,440,400,754.31 - Step 6: Final answer
x = 1,076,885,517.32
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1.5x scale
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.