Finding the Fourth Proportional to 990,160,219.80, 1,485,240,329.70 and 878,238,745.20
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Solution
The fourth proportional to 990,160,219.80, 1,485,240,329.70 and 878,238,745.20 is: 1,317,358,117.80
Step by Step Solution
- Step 1: Write the proportion equation
990,160,219.80 : 1,485,240,329.70 = 878,238,745.20 : x - Step 2: Convert to fraction form
990,160,219.80/1,485,240,329.70 = 878,238,745.20/x - Step 3: Cross multiply
990,160,219.80x = 1,485,240,329.70 × 878,238,745.20 - Step 4: Simplify right side
990,160,219.80x = 1,304,395,603,476,162,304 - Step 5: Solve for x
x = 1,304,395,603,476,162,304/990,160,219.80 - Step 6: Final answer
x = 1,317,358,117.80
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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.