Finding the Fourth Proportional to 457,987.80, 631,609.48 and 285,921.70
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Solution
The fourth proportional to 457,987.80, 631,609.48 and 285,921.70 is: 394,313.68
Step by Step Solution
- Step 1: Write the proportion equation
457,987.80 : 631,609.48 = 285,921.70 : x - Step 2: Convert to fraction form
457,987.80/631,609.48 = 285,921.70/x - Step 3: Cross multiply
457,987.80x = 631,609.48 × 285,921.70 - Step 4: Simplify right side
457,987.80x = 180,590,855,036.09 - Step 5: Solve for x
x = 180,590,855,036.09/457,987.80 - Step 6: Final answer
x = 394,313.68
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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.