Finding the Fourth Proportional to 419,139.67, 628,709.72 and 138,656.92
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Solution
The fourth proportional to 419,139.67, 628,709.72 and 138,656.92 is: 207,985.45
Step by Step Solution
- Step 1: Write the proportion equation
419,139.67 : 628,709.72 = 138,656.92 : x - Step 2: Convert to fraction form
419,139.67/628,709.72 = 138,656.92/x - Step 3: Cross multiply
419,139.67x = 628,709.72 × 138,656.92 - Step 4: Simplify right side
419,139.67x = 87,174,953,349.26 - Step 5: Solve for x
x = 87,174,953,349.26/419,139.67 - Step 6: Final answer
x = 207,985.45
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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.