Finding the Fourth Proportional to 642,723,874.05, 886,959,517.74 and 349,368,442.05
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Solution
The fourth proportional to 642,723,874.05, 886,959,517.74 and 349,368,442.05 is: 482,128,760.71
Step by Step Solution
- Step 1: Write the proportion equation
642,723,874.05 : 886,959,517.74 = 349,368,442.05 : x - Step 2: Convert to fraction form
642,723,874.05/886,959,517.74 = 349,368,442.05/x - Step 3: Cross multiply
642,723,874.05x = 886,959,517.74 × 349,368,442.05 - Step 4: Simplify right side
642,723,874.05x = 309,875,664,874,243,136 - Step 5: Solve for x
x = 309,875,664,874,243,136/642,723,874.05 - Step 6: Final answer
x = 482,128,760.71
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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.