Finding the Fourth Proportional to 926,778,874.40, 1,390,168,311.60 and 489,910,752.80
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Solution
The fourth proportional to 926,778,874.40, 1,390,168,311.60 and 489,910,752.80 is: 734,866,129.20
Step by Step Solution
- Step 1: Write the proportion equation
926,778,874.40 : 1,390,168,311.60 = 489,910,752.80 : x - Step 2: Convert to fraction form
926,778,874.40/1,390,168,311.60 = 489,910,752.80/x - Step 3: Cross multiply
926,778,874.40x = 1,390,168,311.60 × 489,910,752.80 - Step 4: Simplify right side
926,778,874.40x = 681,058,404,054,660,992 - Step 5: Solve for x
x = 681,058,404,054,660,992/926,778,874.40 - Step 6: Final answer
x = 734,866,129.20
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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.