Finding the Fourth Proportional to 402,477.18, 555,391.60 and 221,185.20
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Solution
The fourth proportional to 402,477.18, 555,391.60 and 221,185.20 is: 305,220.79
Step by Step Solution
- Step 1: Write the proportion equation
402,477.18 : 555,391.60 = 221,185.20 : x - Step 2: Convert to fraction form
402,477.18/555,391.60 = 221,185.20/x - Step 3: Cross multiply
402,477.18x = 555,391.60 × 221,185.20 - Step 4: Simplify right side
402,477.18x = 122,844,402,124.32 - Step 5: Solve for x
x = 122,844,402,124.32/402,477.18 - Step 6: Final answer
x = 305,220.79
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.