Finding the Fourth Proportional to 639,779.81, 959,672.42 and 166,431.00
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Solution
The fourth proportional to 639,779.81, 959,672.42 and 166,431.00 is: 249,647.20
Step by Step Solution
- Step 1: Write the proportion equation
639,779.81 : 959,672.42 = 166,431.00 : x - Step 2: Convert to fraction form
639,779.81/959,672.42 = 166,431.00/x - Step 3: Cross multiply
639,779.81x = 959,672.42 × 166,431.00 - Step 4: Simplify right side
639,779.81x = 159,719,236,150.74 - Step 5: Solve for x
x = 159,719,236,150.74/639,779.81 - Step 6: Final answer
x = 249,647.20
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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.