Finding the Fourth Proportional to 644,909.99, 889,969.34 and 358,423.92
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Solution
The fourth proportional to 644,909.99, 889,969.34 and 358,423.92 is: 494,621.43
Step by Step Solution
- Step 1: Write the proportion equation
644,909.99 : 889,969.34 = 358,423.92 : x - Step 2: Convert to fraction form
644,909.99/889,969.34 = 358,423.92/x - Step 3: Cross multiply
644,909.99x = 889,969.34 × 358,423.92 - Step 4: Simplify right side
644,909.99x = 318,986,297,730.49 - Step 5: Solve for x
x = 318,986,297,730.49/644,909.99 - Step 6: Final answer
x = 494,621.43
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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.