Finding the Fourth Proportional to 724,838.96, 1,000,218.21 and 398,135.09
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Solution
The fourth proportional to 724,838.96, 1,000,218.21 and 398,135.09 is: 549,393.71
Step by Step Solution
- Step 1: Write the proportion equation
724,838.96 : 1,000,218.21 = 398,135.09 : x - Step 2: Convert to fraction form
724,838.96/1,000,218.21 = 398,135.09/x - Step 3: Cross multiply
724,838.96x = 1,000,218.21 × 398,135.09 - Step 4: Simplify right side
724,838.96x = 398,221,962,056.90 - Step 5: Solve for x
x = 398,221,962,056.90/724,838.96 - Step 6: Final answer
x = 549,393.71
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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.