Finding the Fourth Proportional to 393,983,800.80, 590,975,701.20 and 121,319,138.40
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Solution
The fourth proportional to 393,983,800.80, 590,975,701.20 and 121,319,138.40 is: 181,978,707.60
Step by Step Solution
- Step 1: Write the proportion equation
393,983,800.80 : 590,975,701.20 = 121,319,138.40 : x - Step 2: Convert to fraction form
393,983,800.80/590,975,701.20 = 121,319,138.40/x - Step 3: Cross multiply
393,983,800.80x = 590,975,701.20 × 121,319,138.40 - Step 4: Simplify right side
393,983,800.80x = 71,696,662,884,919,856 - Step 5: Solve for x
x = 71,696,662,884,919,856/393,983,800.80 - Step 6: Final answer
x = 181,978,707.60
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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.