Finding the Fourth Proportional to 396,681.40, 547,420.98 and 215,393.68
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Solution
The fourth proportional to 396,681.40, 547,420.98 and 215,393.68 is: 297,243.63
Step by Step Solution
- Step 1: Write the proportion equation
396,681.40 : 547,420.98 = 215,393.68 : x - Step 2: Convert to fraction form
396,681.40/547,420.98 = 215,393.68/x - Step 3: Cross multiply
396,681.40x = 547,420.98 × 215,393.68 - Step 4: Simplify right side
396,681.40x = 117,911,019,391.41 - Step 5: Solve for x
x = 117,911,019,391.41/396,681.40 - Step 6: Final answer
x = 297,243.63
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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.