Finding the Fourth Proportional to 420,635.12, 580,453.72 and 239,341.68
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Solution
The fourth proportional to 420,635.12, 580,453.72 and 239,341.68 is: 330,278.58
Step by Step Solution
- Step 1: Write the proportion equation
420,635.12 : 580,453.72 = 239,341.68 : x - Step 2: Convert to fraction form
420,635.12/580,453.72 = 239,341.68/x - Step 3: Cross multiply
420,635.12x = 580,453.72 × 239,341.68 - Step 4: Simplify right side
420,635.12x = 138,926,768,507.05 - Step 5: Solve for x
x = 138,926,768,507.05/420,635.12 - Step 6: Final answer
x = 330,278.58
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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.