Finding the Fourth Proportional to 419,139.42, 628,709.34 and 138,656.67
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Solution
The fourth proportional to 419,139.42, 628,709.34 and 138,656.67 is: 207,985.07
Step by Step Solution
- Step 1: Write the proportion equation
419,139.42 : 628,709.34 = 138,656.67 : x - Step 2: Convert to fraction form
419,139.42/628,709.34 = 138,656.67/x - Step 3: Cross multiply
419,139.42x = 628,709.34 × 138,656.67 - Step 4: Simplify right side
419,139.42x = 87,174,743,482.30 - Step 5: Solve for x
x = 87,174,743,482.30/419,139.42 - Step 6: Final answer
x = 207,985.07
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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.