Finding the Fourth Proportional to 812.99, 1,121.95 and 458.99
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Solution
The fourth proportional to 812.99, 1,121.95 and 458.99 is: 633.42
Step by Step Solution
- Step 1: Write the proportion equation
812.99 : 1,121.95 = 458.99 : x - Step 2: Convert to fraction form
812.99/1,121.95 = 458.99/x - Step 3: Cross multiply
812.99x = 1,121.95 × 458.99 - Step 4: Simplify right side
812.99x = 514,963.83 - Step 5: Solve for x
x = 514,963.83/812.99 - Step 6: Final answer
x = 633.42
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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.