Finding the Fourth Proportional to 874,915,605.20, 1,312,373,407.80 and 861,310,715.60
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Solution
The fourth proportional to 874,915,605.20, 1,312,373,407.80 and 861,310,715.60 is: 1,291,966,073.40
Step by Step Solution
- Step 1: Write the proportion equation
874,915,605.20 : 1,312,373,407.80 = 861,310,715.60 : x - Step 2: Convert to fraction form
874,915,605.20/1,312,373,407.80 = 861,310,715.60/x - Step 3: Cross multiply
874,915,605.20x = 1,312,373,407.80 × 861,310,715.60 - Step 4: Simplify right side
874,915,605.20x = 1,130,361,279,006,628,608 - Step 5: Solve for x
x = 1,130,361,279,006,628,608/874,915,605.20 - Step 6: Final answer
x = 1,291,966,073.40
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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.