Finding the Fourth Proportional to 644,394.13, 889,263.96 and 357,940.87
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Solution
The fourth proportional to 644,394.13, 889,263.96 and 357,940.87 is: 493,958.43
Step by Step Solution
- Step 1: Write the proportion equation
644,394.13 : 889,263.96 = 357,940.87 : x - Step 2: Convert to fraction form
644,394.13/889,263.96 = 357,940.87/x - Step 3: Cross multiply
644,394.13x = 889,263.96 × 357,940.87 - Step 4: Simplify right side
644,394.13x = 318,303,915,502.05 - Step 5: Solve for x
x = 318,303,915,502.05/644,394.13 - Step 6: Final answer
x = 493,958.43
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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.