Finding the Fourth Proportional to 420,934.40, 631,372.80 and 136,620.80
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Solution
The fourth proportional to 420,934.40, 631,372.80 and 136,620.80 is: 204,921.85
Step by Step Solution
- Step 1: Write the proportion equation
420,934.40 : 631,372.80 = 136,620.80 : x - Step 2: Convert to fraction form
420,934.40/631,372.80 = 136,620.80/x - Step 3: Cross multiply
420,934.40x = 631,372.80 × 136,620.80 - Step 4: Simplify right side
420,934.40x = 86,258,657,034.24 - Step 5: Solve for x
x = 86,258,657,034.24/420,934.40 - Step 6: Final answer
x = 204,921.85
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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.