Finding the Fourth Proportional to 257,378.90, 385,936.70 and 107,578.31
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Solution
The fourth proportional to 257,378.90, 385,936.70 and 107,578.31 is: 161,312.43
Step by Step Solution
- Step 1: Write the proportion equation
257,378.90 : 385,936.70 = 107,578.31 : x - Step 2: Convert to fraction form
257,378.90/385,936.70 = 107,578.31/x - Step 3: Cross multiply
257,378.90x = 385,936.70 × 107,578.31 - Step 4: Simplify right side
257,378.90x = 41,518,415,485.40 - Step 5: Solve for x
x = 41,518,415,485.40/257,378.90 - Step 6: Final answer
x = 161,312.43
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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.