Finding the Fourth Proportional to 644,760.84, 889,851.78 and 390,114.12
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Solution
The fourth proportional to 644,760.84, 889,851.78 and 390,114.12 is: 538,406.99
Step by Step Solution
- Step 1: Write the proportion equation
644,760.84 : 889,851.78 = 390,114.12 : x - Step 2: Convert to fraction form
644,760.84/889,851.78 = 390,114.12/x - Step 3: Cross multiply
644,760.84x = 889,851.78 × 390,114.12 - Step 4: Simplify right side
644,760.84x = 347,143,744,085.13 - Step 5: Solve for x
x = 347,143,744,085.13/644,760.84 - Step 6: Final answer
x = 538,406.99
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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.