Finding the Fourth Proportional to 990,188,598.80, 1,366,497,143.88 and 593,776,128.08
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Solution
The fourth proportional to 990,188,598.80, 1,366,497,143.88 and 593,776,128.08 is: 819,433,170.72
Step by Step Solution
- Step 1: Write the proportion equation
990,188,598.80 : 1,366,497,143.88 = 593,776,128.08 : x - Step 2: Convert to fraction form
990,188,598.80/1,366,497,143.88 = 593,776,128.08/x - Step 3: Cross multiply
990,188,598.80x = 1,366,497,143.88 × 593,776,128.08 - Step 4: Simplify right side
990,188,598.80x = 811,393,383,125,445,248 - Step 5: Solve for x
x = 811,393,383,125,445,248/990,188,598.80 - Step 6: Final answer
x = 819,433,170.72
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1.5x scale
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.