Finding the Fourth Proportional to 415,881.20, 623,821.80 and 389,637.20
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Solution
The fourth proportional to 415,881.20, 623,821.80 and 389,637.20 is: 584,455.80
Step by Step Solution
- Step 1: Write the proportion equation
415,881.20 : 623,821.80 = 389,637.20 : x - Step 2: Convert to fraction form
415,881.20/623,821.80 = 389,637.20/x - Step 3: Cross multiply
415,881.20x = 623,821.80 × 389,637.20 - Step 4: Simplify right side
415,881.20x = 243,064,179,450.96 - Step 5: Solve for x
x = 243,064,179,450.96/415,881.20 - Step 6: Final answer
x = 584,455.80
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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.