Finding the Fourth Proportional to 420,135.60, 628,854.60 and 220,170.80
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Solution
The fourth proportional to 420,135.60, 628,854.60 and 220,170.80 is: 329,549.37
Step by Step Solution
- Step 1: Write the proportion equation
420,135.60 : 628,854.60 = 220,170.80 : x - Step 2: Convert to fraction form
420,135.60/628,854.60 = 220,170.80/x - Step 3: Cross multiply
420,135.60x = 628,854.60 × 220,170.80 - Step 4: Simplify right side
420,135.60x = 138,455,420,365.68 - Step 5: Solve for x
x = 138,455,420,365.68/420,135.60 - Step 6: Final answer
x = 329,549.37
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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.