Finding the Fourth Proportional to 686,594,659.20, 1,029,891,988.80 and 255,683,990.40
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Solution
The fourth proportional to 686,594,659.20, 1,029,891,988.80 and 255,683,990.40 is: 383,525,985.60
Step by Step Solution
- Step 1: Write the proportion equation
686,594,659.20 : 1,029,891,988.80 = 255,683,990.40 : x - Step 2: Convert to fraction form
686,594,659.20/1,029,891,988.80 = 255,683,990.40/x - Step 3: Cross multiply
686,594,659.20x = 1,029,891,988.80 × 255,683,990.40 - Step 4: Simplify right side
686,594,659.20x = 263,326,893,377,376,096 - Step 5: Solve for x
x = 263,326,893,377,376,096/686,594,659.20 - Step 6: Final answer
x = 383,525,985.60
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1.5x scale
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.