Finding the Fourth Proportional to 221,275,231.80, 331,912,847.70 and 209,937,823.80
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Solution
The fourth proportional to 221,275,231.80, 331,912,847.70 and 209,937,823.80 is: 314,906,735.70
Step by Step Solution
- Step 1: Write the proportion equation
221,275,231.80 : 331,912,847.70 = 209,937,823.80 : x - Step 2: Convert to fraction form
221,275,231.80/331,912,847.70 = 209,937,823.80/x - Step 3: Cross multiply
221,275,231.80x = 331,912,847.70 × 209,937,823.80 - Step 4: Simplify right side
221,275,231.80x = 69,681,060,937,398,840 - Step 5: Solve for x
x = 69,681,060,937,398,840/221,275,231.80 - Step 6: Final answer
x = 314,906,735.70
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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.