Finding the Fourth Proportional to 722,808.24, 997,489.80 and 421,021.68
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Solution
The fourth proportional to 722,808.24, 997,489.80 and 421,021.68 is: 581,018.32
Step by Step Solution
- Step 1: Write the proportion equation
722,808.24 : 997,489.80 = 421,021.68 : x - Step 2: Convert to fraction form
722,808.24/997,489.80 = 421,021.68/x - Step 3: Cross multiply
722,808.24x = 997,489.80 × 421,021.68 - Step 4: Simplify right side
722,808.24x = 419,964,831,378.86 - Step 5: Solve for x
x = 419,964,831,378.86/722,808.24 - Step 6: Final answer
x = 581,018.32
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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.