Finding the Fourth Proportional to 519,986.18, 717,585.68 and 305,129.84
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Solution
The fourth proportional to 519,986.18, 717,585.68 and 305,129.84 is: 421,081.96
Step by Step Solution
- Step 1: Write the proportion equation
519,986.18 : 717,585.68 = 305,129.84 : x - Step 2: Convert to fraction form
519,986.18/717,585.68 = 305,129.84/x - Step 3: Cross multiply
519,986.18x = 717,585.68 × 305,129.84 - Step 4: Simplify right side
519,986.18x = 218,956,800,899.59 - Step 5: Solve for x
x = 218,956,800,899.59/519,986.18 - Step 6: Final answer
x = 421,081.96
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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.