Finding the Fourth Proportional to 1,319,378,861.48, 1,820,778,384.81 and 776,257,717.58
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Solution
The fourth proportional to 1,319,378,861.48, 1,820,778,384.81 and 776,257,717.58 is: 1,071,256,569.64
Step by Step Solution
- Step 1: Write the proportion equation
1,319,378,861.48 : 1,820,778,384.81 = 776,257,717.58 : x - Step 2: Convert to fraction form
1,319,378,861.48/1,820,778,384.81 = 776,257,717.58/x - Step 3: Cross multiply
1,319,378,861.48x = 1,820,778,384.81 × 776,257,717.58 - Step 4: Simplify right side
1,319,378,861.48x = 1,413,393,273,202,505,728 - Step 5: Solve for x
x = 1,413,393,273,202,505,728/1,319,378,861.48 - Step 6: Final answer
x = 1,071,256,569.64
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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.