Finding the Fourth Proportional to 261,378.30, 391,909.60 and 117,257.74
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Solution
The fourth proportional to 261,378.30, 391,909.60 and 117,257.74 is: 175,815.80
Step by Step Solution
- Step 1: Write the proportion equation
261,378.30 : 391,909.60 = 117,257.74 : x - Step 2: Convert to fraction form
261,378.30/391,909.60 = 117,257.74/x - Step 3: Cross multiply
261,378.30x = 391,909.60 × 117,257.74 - Step 4: Simplify right side
261,378.30x = 45,954,433,980.30 - Step 5: Solve for x
x = 45,954,433,980.30/261,378.30 - Step 6: Final answer
x = 175,815.80
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.