Finding the Fourth Proportional to 339.78, 509.40 and 157.26
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Solution
The fourth proportional to 339.78, 509.40 and 157.26 is: 235.77
Step by Step Solution
- Step 1: Write the proportion equation
339.78 : 509.40 = 157.26 : x - Step 2: Convert to fraction form
339.78/509.40 = 157.26/x - Step 3: Cross multiply
339.78x = 509.40 × 157.26 - Step 4: Simplify right side
339.78x = 80,108.24 - Step 5: Solve for x
x = 80,108.24/339.78 - Step 6: Final answer
x = 235.77
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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.