Finding the Fourth Proportional to 747,648,800.40, 1,121,473,200.60 and 489,659,782.80
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Solution
The fourth proportional to 747,648,800.40, 1,121,473,200.60 and 489,659,782.80 is: 734,489,674.20
Step by Step Solution
- Step 1: Write the proportion equation
747,648,800.40 : 1,121,473,200.60 = 489,659,782.80 : x - Step 2: Convert to fraction form
747,648,800.40/1,121,473,200.60 = 489,659,782.80/x - Step 3: Cross multiply
747,648,800.40x = 1,121,473,200.60 × 489,659,782.80 - Step 4: Simplify right side
747,648,800.40x = 549,140,323,821,816,768 - Step 5: Solve for x
x = 549,140,323,821,816,768/747,648,800.40 - Step 6: Final answer
x = 734,489,674.20
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Double scale
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Similar ratio
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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.