Finding the Fourth Proportional to 309,937.80, 464,906.70 and 257,449.80
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Solution
The fourth proportional to 309,937.80, 464,906.70 and 257,449.80 is: 386,174.70
Step by Step Solution
- Step 1: Write the proportion equation
309,937.80 : 464,906.70 = 257,449.80 : x - Step 2: Convert to fraction form
309,937.80/464,906.70 = 257,449.80/x - Step 3: Cross multiply
309,937.80x = 464,906.70 × 257,449.80 - Step 4: Simplify right side
309,937.80x = 119,690,136,933.66 - Step 5: Solve for x
x = 119,690,136,933.66/309,937.80 - Step 6: Final answer
x = 386,174.70
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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.