Finding the Fourth Proportional to 398,640,282.60, 597,960,423.90 and 390,578,125.80
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Solution
The fourth proportional to 398,640,282.60, 597,960,423.90 and 390,578,125.80 is: 585,867,188.70
Step by Step Solution
- Step 1: Write the proportion equation
398,640,282.60 : 597,960,423.90 = 390,578,125.80 : x - Step 2: Convert to fraction form
398,640,282.60/597,960,423.90 = 390,578,125.80/x - Step 3: Cross multiply
398,640,282.60x = 597,960,423.90 × 390,578,125.80 - Step 4: Simplify right side
398,640,282.60x = 233,550,261,669,435,520 - Step 5: Solve for x
x = 233,550,261,669,435,520/398,640,282.60 - Step 6: Final answer
x = 585,867,188.70
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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.