Finding the Fourth Proportional to 631,615.84, 871,627.68 and 345,138.40
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Solution
The fourth proportional to 631,615.84, 871,627.68 and 345,138.40 is: 476,289.80
Step by Step Solution
- Step 1: Write the proportion equation
631,615.84 : 871,627.68 = 345,138.40 : x - Step 2: Convert to fraction form
631,615.84/871,627.68 = 345,138.40/x - Step 3: Cross multiply
631,615.84x = 871,627.68 × 345,138.40 - Step 4: Simplify right side
631,615.84x = 300,832,182,870.91 - Step 5: Solve for x
x = 300,832,182,870.91/631,615.84 - Step 6: Final answer
x = 476,289.80
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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.