Finding the Fourth Proportional to 386,639,369.64, 579,779,247.42 and 140,824,878.84
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Solution
The fourth proportional to 386,639,369.64, 579,779,247.42 and 140,824,878.84 is: 211,171,827.50
Step by Step Solution
- Step 1: Write the proportion equation
386,639,369.64 : 579,779,247.42 = 140,824,878.84 : x - Step 2: Convert to fraction form
386,639,369.64/579,779,247.42 = 140,824,878.84/x - Step 3: Cross multiply
386,639,369.64x = 579,779,247.42 × 140,824,878.84 - Step 4: Simplify right side
386,639,369.64x = 81,647,342,271,867,872 - Step 5: Solve for x
x = 81,647,342,271,867,872/386,639,369.64 - Step 6: Final answer
x = 211,171,827.50
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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.