Finding the Fourth Proportional to 921.48, 1,272 and 589.92
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Solution
The fourth proportional to 921.48, 1,272 and 589.92 is: 814.32
Step by Step Solution
- Step 1: Write the proportion equation
921.48 : 1,272 = 589.92 : x - Step 2: Convert to fraction form
921.48/1,272 = 589.92/x - Step 3: Cross multiply
921.48x = 1,272 × 589.92 - Step 4: Simplify right side
921.48x = 750,378.24 - Step 5: Solve for x
x = 750,378.24/921.48 - Step 6: Final answer
x = 814.32
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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.