Finding the Fourth Proportional to 1,243,117,776.84, 1,715,496,550.74 and 686,195,952.36
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Solution
The fourth proportional to 1,243,117,776.84, 1,715,496,550.74 and 686,195,952.36 is: 946,947,112.60
Step by Step Solution
- Step 1: Write the proportion equation
1,243,117,776.84 : 1,715,496,550.74 = 686,195,952.36 : x - Step 2: Convert to fraction form
1,243,117,776.84/1,715,496,550.74 = 686,195,952.36/x - Step 3: Cross multiply
1,243,117,776.84x = 1,715,496,550.74 × 686,195,952.36 - Step 4: Simplify right side
1,243,117,776.84x = 1,177,166,789,405,329,408 - Step 5: Solve for x
x = 1,177,166,789,405,329,408/1,243,117,776.84 - Step 6: Final answer
x = 946,947,112.60
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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.