Finding the Fourth Proportional to 426,547,771.20, 639,821,656.80 and 392,955,451.20
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Solution
The fourth proportional to 426,547,771.20, 639,821,656.80 and 392,955,451.20 is: 589,433,176.80
Step by Step Solution
- Step 1: Write the proportion equation
426,547,771.20 : 639,821,656.80 = 392,955,451.20 : x - Step 2: Convert to fraction form
426,547,771.20/639,821,656.80 = 392,955,451.20/x - Step 3: Cross multiply
426,547,771.20x = 639,821,656.80 × 392,955,451.20 - Step 4: Simplify right side
426,547,771.20x = 251,421,407,835,375,520 - Step 5: Solve for x
x = 251,421,407,835,375,520/426,547,771.20 - Step 6: Final answer
x = 589,433,176.80
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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.