Finding the Fourth Proportional to 319,400,807.70, 479,101,211.55 and 137,647,985.70
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Solution
The fourth proportional to 319,400,807.70, 479,101,211.55 and 137,647,985.70 is: 206,471,978.55
Step by Step Solution
- Step 1: Write the proportion equation
319,400,807.70 : 479,101,211.55 = 137,647,985.70 : x - Step 2: Convert to fraction form
319,400,807.70/479,101,211.55 = 137,647,985.70/x - Step 3: Cross multiply
319,400,807.70x = 479,101,211.55 × 137,647,985.70 - Step 4: Simplify right side
319,400,807.70x = 65,947,316,716,287,072 - Step 5: Solve for x
x = 65,947,316,716,287,072/319,400,807.70 - Step 6: Final answer
x = 206,471,978.55
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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.