Finding the Fourth Proportional to 420,811.80, 631,217.70 and 263,347.80
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Solution
The fourth proportional to 420,811.80, 631,217.70 and 263,347.80 is: 395,021.70
Step by Step Solution
- Step 1: Write the proportion equation
420,811.80 : 631,217.70 = 263,347.80 : x - Step 2: Convert to fraction form
420,811.80/631,217.70 = 263,347.80/x - Step 3: Cross multiply
420,811.80x = 631,217.70 × 263,347.80 - Step 4: Simplify right side
420,811.80x = 166,229,792,616.06 - Step 5: Solve for x
x = 166,229,792,616.06/420,811.80 - Step 6: Final answer
x = 395,021.70
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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.