Finding the Fourth Proportional to 518,791,590.66, 715,861,689.84 and 309,903,391.20
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Solution
The fourth proportional to 518,791,590.66, 715,861,689.84 and 309,903,391.20 is: 427,624,443.62
Step by Step Solution
- Step 1: Write the proportion equation
518,791,590.66 : 715,861,689.84 = 309,903,391.20 : x - Step 2: Convert to fraction form
518,791,590.66/715,861,689.84 = 309,903,391.20/x - Step 3: Cross multiply
518,791,590.66x = 715,861,689.84 × 309,903,391.20 - Step 4: Simplify right side
518,791,590.66x = 221,847,965,311,578,592 - Step 5: Solve for x
x = 221,847,965,311,578,592/518,791,590.66 - Step 6: Final answer
x = 427,624,443.62
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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.