Finding the Fourth Proportional to 1,243,270,720.88, 1,715,668,616.40 and 686,341,809.44
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Solution
The fourth proportional to 1,243,270,720.88, 1,715,668,616.40 and 686,341,809.44 is: 947,126,866.90
Step by Step Solution
- Step 1: Write the proportion equation
1,243,270,720.88 : 1,715,668,616.40 = 686,341,809.44 : x - Step 2: Convert to fraction form
1,243,270,720.88/1,715,668,616.40 = 686,341,809.44/x - Step 3: Cross multiply
1,243,270,720.88x = 1,715,668,616.40 × 686,341,809.44 - Step 4: Simplify right side
1,243,270,720.88x = 1,177,535,102,579,397,376 - Step 5: Solve for x
x = 1,177,535,102,579,397,376/1,243,270,720.88 - Step 6: Final answer
x = 947,126,866.90
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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.