Finding the Fourth Proportional to 458,387.20, 687,645.60 and 142,811.20
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Solution
The fourth proportional to 458,387.20, 687,645.60 and 142,811.20 is: 214,236.99
Step by Step Solution
- Step 1: Write the proportion equation
458,387.20 : 687,645.60 = 142,811.20 : x - Step 2: Convert to fraction form
458,387.20/687,645.60 = 142,811.20/x - Step 3: Cross multiply
458,387.20x = 687,645.60 × 142,811.20 - Step 4: Simplify right side
458,387.20x = 98,203,493,310.72 - Step 5: Solve for x
x = 98,203,493,310.72/458,387.20 - Step 6: Final answer
x = 214,236.99
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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.