Finding the Fourth Proportional to 815.55, 1,125.19 and 520.99
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Solution
The fourth proportional to 815.55, 1,125.19 and 520.99 is: 718.79
Step by Step Solution
- Step 1: Write the proportion equation
815.55 : 1,125.19 = 520.99 : x - Step 2: Convert to fraction form
815.55/1,125.19 = 520.99/x - Step 3: Cross multiply
815.55x = 1,125.19 × 520.99 - Step 4: Simplify right side
815.55x = 586,210.13 - Step 5: Solve for x
x = 586,210.13/815.55 - Step 6: Final answer
x = 718.79
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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.