Finding the Fourth Proportional to 553.64, 829.55 and 390.99
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Solution
The fourth proportional to 553.64, 829.55 and 390.99 is: 585.84
Step by Step Solution
- Step 1: Write the proportion equation
553.64 : 829.55 = 390.99 : x - Step 2: Convert to fraction form
553.64/829.55 = 390.99/x - Step 3: Cross multiply
553.64x = 829.55 × 390.99 - Step 4: Simplify right side
553.64x = 324,345.75 - Step 5: Solve for x
x = 324,345.75/553.64 - Step 6: Final answer
x = 585.84
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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.