Finding the Fourth Proportional to 572,689.12, 790,311.60 and 318,040.80
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Solution
The fourth proportional to 572,689.12, 790,311.60 and 318,040.80 is: 438,896.65
Step by Step Solution
- Step 1: Write the proportion equation
572,689.12 : 790,311.60 = 318,040.80 : x - Step 2: Convert to fraction form
572,689.12/790,311.60 = 318,040.80/x - Step 3: Cross multiply
572,689.12x = 790,311.60 × 318,040.80 - Step 4: Simplify right side
572,689.12x = 251,351,333,513.28 - Step 5: Solve for x
x = 251,351,333,513.28/572,689.12 - Step 6: Final answer
x = 438,896.65
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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.