Finding the Fourth Proportional to 420,005.49, 629,811.19 and 153,579.70
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Solution
The fourth proportional to 420,005.49, 629,811.19 and 153,579.70 is: 230,297.50
Step by Step Solution
- Step 1: Write the proportion equation
420,005.49 : 629,811.19 = 153,579.70 : x - Step 2: Convert to fraction form
420,005.49/629,811.19 = 153,579.70/x - Step 3: Cross multiply
420,005.49x = 629,811.19 × 153,579.70 - Step 4: Simplify right side
420,005.49x = 96,726,213,616.84 - Step 5: Solve for x
x = 96,726,213,616.84/420,005.49 - Step 6: Final answer
x = 230,297.50
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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.