Finding the Fourth Proportional to 639,083,138.90, 958,624,708.35 and 329,146,747.70
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Solution
The fourth proportional to 639,083,138.90, 958,624,708.35 and 329,146,747.70 is: 493,720,121.55
Step by Step Solution
- Step 1: Write the proportion equation
639,083,138.90 : 958,624,708.35 = 329,146,747.70 : x - Step 2: Convert to fraction form
639,083,138.90/958,624,708.35 = 329,146,747.70/x - Step 3: Cross multiply
639,083,138.90x = 958,624,708.35 × 329,146,747.70 - Step 4: Simplify right side
639,083,138.90x = 315,528,205,018,263,552 - Step 5: Solve for x
x = 315,528,205,018,263,552/639,083,138.90 - Step 6: Final answer
x = 493,720,121.55
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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.