Finding the Fourth Proportional to 1,020,921,919.20, 1,531,382,878.80 and 998,247,103.20
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Solution
The fourth proportional to 1,020,921,919.20, 1,531,382,878.80 and 998,247,103.20 is: 1,497,370,654.80
Step by Step Solution
- Step 1: Write the proportion equation
1,020,921,919.20 : 1,531,382,878.80 = 998,247,103.20 : x - Step 2: Convert to fraction form
1,020,921,919.20/1,531,382,878.80 = 998,247,103.20/x - Step 3: Cross multiply
1,020,921,919.20x = 1,531,382,878.80 × 998,247,103.20 - Step 4: Simplify right side
1,020,921,919.20x = 1,528,698,522,652,176,640 - Step 5: Solve for x
x = 1,528,698,522,652,176,640/1,020,921,919.20 - Step 6: Final answer
x = 1,497,370,654.80
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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.