Finding the Fourth Proportional to 431,365.80, 647,048.70 and 405,121.80
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Solution
The fourth proportional to 431,365.80, 647,048.70 and 405,121.80 is: 607,682.70
Step by Step Solution
- Step 1: Write the proportion equation
431,365.80 : 647,048.70 = 405,121.80 : x - Step 2: Convert to fraction form
431,365.80/647,048.70 = 405,121.80/x - Step 3: Cross multiply
431,365.80x = 647,048.70 × 405,121.80 - Step 4: Simplify right side
431,365.80x = 262,133,534,031.66 - Step 5: Solve for x
x = 262,133,534,031.66/431,365.80 - Step 6: Final answer
x = 607,682.70
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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.