Finding the Fourth Proportional to 1,438,900.22, 1,985,718.41 and 818,671.20
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Solution
The fourth proportional to 1,438,900.22, 1,985,718.41 and 818,671.20 is: 1,129,786.80
Step by Step Solution
- Step 1: Write the proportion equation
1,438,900.22 : 1,985,718.41 = 818,671.20 : x - Step 2: Convert to fraction form
1,438,900.22/1,985,718.41 = 818,671.20/x - Step 3: Cross multiply
1,438,900.22x = 1,985,718.41 × 818,671.20 - Step 4: Simplify right side
1,438,900.22x = 1,625,650,473,576.79 - Step 5: Solve for x
x = 1,625,650,473,576.79/1,438,900.22 - Step 6: Final answer
x = 1,129,786.80
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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.