Finding the Fourth Proportional to 918,678,639.80, 1,378,017,959.70 and 918,678,639.80
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Solution
The fourth proportional to 918,678,639.80, 1,378,017,959.70 and 918,678,639.80 is: 1,378,017,959.70
Step by Step Solution
- Step 1: Write the proportion equation
918,678,639.80 : 1,378,017,959.70 = 918,678,639.80 : x - Step 2: Convert to fraction form
918,678,639.80/1,378,017,959.70 = 918,678,639.80/x - Step 3: Cross multiply
918,678,639.80x = 1,378,017,959.70 × 918,678,639.80 - Step 4: Simplify right side
918,678,639.80x = 1,265,955,664,837,167,104 - Step 5: Solve for x
x = 1,265,955,664,837,167,104/918,678,639.80 - Step 6: Final answer
x = 1,378,017,959.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.