Finding the Fourth Proportional to 644,689.19, 889,748.69 and 372,823.90
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Solution
The fourth proportional to 644,689.19, 889,748.69 and 372,823.90 is: 514,541.85
Step by Step Solution
- Step 1: Write the proportion equation
644,689.19 : 889,748.69 = 372,823.90 : x - Step 2: Convert to fraction form
644,689.19/889,748.69 = 372,823.90/x - Step 3: Cross multiply
644,689.19x = 889,748.69 × 372,823.90 - Step 4: Simplify right side
644,689.19x = 331,719,572,537.20 - Step 5: Solve for x
x = 331,719,572,537.20/644,689.19 - Step 6: Final answer
x = 514,541.85
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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.