Finding the Fourth Proportional to 288,387,956.99, 398,503,287.63 and 209,935,307.96
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Solution
The fourth proportional to 288,387,956.99, 398,503,287.63 and 209,935,307.96 is: 290,095,020.90
Step by Step Solution
- Step 1: Write the proportion equation
288,387,956.99 : 398,503,287.63 = 209,935,307.96 : x - Step 2: Convert to fraction form
288,387,956.99/398,503,287.63 = 209,935,307.96/x - Step 3: Cross multiply
288,387,956.99x = 398,503,287.63 × 209,935,307.96 - Step 4: Simplify right side
288,387,956.99x = 83,659,910,411,676,512 - Step 5: Solve for x
x = 83,659,910,411,676,512/288,387,956.99 - Step 6: Final answer
x = 290,095,020.90
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.