Finding the Fourth Proportional to 839,907.80, 1,259,861.70 and 307,251.80
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Solution
The fourth proportional to 839,907.80, 1,259,861.70 and 307,251.80 is: 460,877.70
Step by Step Solution
- Step 1: Write the proportion equation
839,907.80 : 1,259,861.70 = 307,251.80 : x - Step 2: Convert to fraction form
839,907.80/1,259,861.70 = 307,251.80/x - Step 3: Cross multiply
839,907.80x = 1,259,861.70 × 307,251.80 - Step 4: Simplify right side
839,907.80x = 387,094,775,076.06 - Step 5: Solve for x
x = 387,094,775,076.06/839,907.80 - Step 6: Final answer
x = 460,877.70
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Double scale
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Similar ratio
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1.5x scale
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.