Finding the Fourth Proportional to 431.13, 646.63 and 157.19
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Solution
The fourth proportional to 431.13, 646.63 and 157.19 is: 235.75
Step by Step Solution
- Step 1: Write the proportion equation
431.13 : 646.63 = 157.19 : x - Step 2: Convert to fraction form
431.13/646.63 = 157.19/x - Step 3: Cross multiply
431.13x = 646.63 × 157.19 - Step 4: Simplify right side
431.13x = 101,640.14 - Step 5: Solve for x
x = 101,640.14/431.13 - Step 6: Final answer
x = 235.75
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.