Finding the Fourth Proportional to 644,721.60, 889,461.12 and 372,739.68
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Solution
The fourth proportional to 644,721.60, 889,461.12 and 372,739.68 is: 514,233.51
Step by Step Solution
- Step 1: Write the proportion equation
644,721.60 : 889,461.12 = 372,739.68 : x - Step 2: Convert to fraction form
644,721.60/889,461.12 = 372,739.68/x - Step 3: Cross multiply
644,721.60x = 889,461.12 × 372,739.68 - Step 4: Simplify right side
644,721.60x = 331,537,453,241.24 - Step 5: Solve for x
x = 331,537,453,241.24/644,721.60 - Step 6: Final answer
x = 514,233.51
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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.