Finding the Fourth Proportional to 351.55, 485.49 and 289.99
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Solution
The fourth proportional to 351.55, 485.49 and 289.99 is: 400.48
Step by Step Solution
- Step 1: Write the proportion equation
351.55 : 485.49 = 289.99 : x - Step 2: Convert to fraction form
351.55/485.49 = 289.99/x - Step 3: Cross multiply
351.55x = 485.49 × 289.99 - Step 4: Simplify right side
351.55x = 140,787.25 - Step 5: Solve for x
x = 140,787.25/351.55 - Step 6: Final answer
x = 400.48
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.