Finding the Fourth Proportional to 915,124,843.68, 1,263,480,391.80 and 703,053,975.84
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Solution
The fourth proportional to 915,124,843.68, 1,263,480,391.80 and 703,053,975.84 is: 970,681,671.45
Step by Step Solution
- Step 1: Write the proportion equation
915,124,843.68 : 1,263,480,391.80 = 703,053,975.84 : x - Step 2: Convert to fraction form
915,124,843.68/1,263,480,391.80 = 703,053,975.84/x - Step 3: Cross multiply
915,124,843.68x = 1,263,480,391.80 × 703,053,975.84 - Step 4: Simplify right side
915,124,843.68x = 888,294,912,850,870,912 - Step 5: Solve for x
x = 888,294,912,850,870,912/915,124,843.68 - Step 6: Final answer
x = 970,681,671.45
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Double scale
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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.