Finding the Fourth Proportional to 939,514,646.80, 1,409,271,970.20 and 789,860,861.20
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Solution
The fourth proportional to 939,514,646.80, 1,409,271,970.20 and 789,860,861.20 is: 1,184,791,291.80
Step by Step Solution
- Step 1: Write the proportion equation
939,514,646.80 : 1,409,271,970.20 = 789,860,861.20 : x - Step 2: Convert to fraction form
939,514,646.80/1,409,271,970.20 = 789,860,861.20/x - Step 3: Cross multiply
939,514,646.80x = 1,409,271,970.20 × 789,860,861.20 - Step 4: Simplify right side
939,514,646.80x = 1,113,128,772,047,192,832 - Step 5: Solve for x
x = 1,113,128,772,047,192,832/939,514,646.80 - Step 6: Final answer
x = 1,184,791,291.80
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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.