Finding the Fourth Proportional to 644,457.96, 889,208.82 and 389,803.68
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Solution
The fourth proportional to 644,457.96, 889,208.82 and 389,803.68 is: 537,842.48
Step by Step Solution
- Step 1: Write the proportion equation
644,457.96 : 889,208.82 = 389,803.68 : x - Step 2: Convert to fraction form
644,457.96/889,208.82 = 389,803.68/x - Step 3: Cross multiply
644,457.96x = 889,208.82 × 389,803.68 - Step 4: Simplify right side
644,457.96x = 346,616,870,324.46 - Step 5: Solve for x
x = 346,616,870,324.46/644,457.96 - Step 6: Final answer
x = 537,842.48
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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.