Finding the Fourth Proportional to 687,221.62, 1,028,909.08 and 518,212.99
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Solution
The fourth proportional to 687,221.62, 1,028,909.08 and 518,212.99 is: 775,869.15
Step by Step Solution
- Step 1: Write the proportion equation
687,221.62 : 1,028,909.08 = 518,212.99 : x - Step 2: Convert to fraction form
687,221.62/1,028,909.08 = 518,212.99/x - Step 3: Cross multiply
687,221.62x = 1,028,909.08 × 518,212.99 - Step 4: Simplify right side
687,221.62x = 533,194,052,718.85 - Step 5: Solve for x
x = 533,194,052,718.85/687,221.62 - Step 6: Final answer
x = 775,869.15
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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.