Finding the Fourth Proportional to 339.68, 509.21 and 157.02
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Solution
The fourth proportional to 339.68, 509.21 and 157.02 is: 235.39
Step by Step Solution
- Step 1: Write the proportion equation
339.68 : 509.21 = 157.02 : x - Step 2: Convert to fraction form
339.68/509.21 = 157.02/x - Step 3: Cross multiply
339.68x = 509.21 × 157.02 - Step 4: Simplify right side
339.68x = 79,955.37 - Step 5: Solve for x
x = 79,955.37/339.68 - Step 6: Final answer
x = 235.39
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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.