Finding the Fourth Proportional to 427,310,252.20, 640,965,378.30 and 398,644,805.80
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Solution
The fourth proportional to 427,310,252.20, 640,965,378.30 and 398,644,805.80 is: 597,967,208.70
Step by Step Solution
- Step 1: Write the proportion equation
427,310,252.20 : 640,965,378.30 = 398,644,805.80 : x - Step 2: Convert to fraction form
427,310,252.20/640,965,378.30 = 398,644,805.80/x - Step 3: Cross multiply
427,310,252.20x = 640,965,378.30 × 398,644,805.80 - Step 4: Simplify right side
427,310,252.20x = 255,517,518,756,927,008 - Step 5: Solve for x
x = 255,517,518,756,927,008/427,310,252.20 - Step 6: Final answer
x = 597,967,208.70
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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.