Finding the Fourth Proportional to 257,381,657.80, 386,072,486.70 and 257,381,657.80
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Solution
The fourth proportional to 257,381,657.80, 386,072,486.70 and 257,381,657.80 is: 386,072,486.70
Step by Step Solution
- Step 1: Write the proportion equation
257,381,657.80 : 386,072,486.70 = 257,381,657.80 : x - Step 2: Convert to fraction form
257,381,657.80/386,072,486.70 = 257,381,657.80/x - Step 3: Cross multiply
257,381,657.80x = 386,072,486.70 × 257,381,657.80 - Step 4: Simplify right side
257,381,657.80x = 99,367,976,657,814,448 - Step 5: Solve for x
x = 99,367,976,657,814,448/257,381,657.80 - Step 6: Final answer
x = 386,072,486.70
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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.