Finding the Fourth Proportional to 438.18, 657.48 and 207.18
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Solution
The fourth proportional to 438.18, 657.48 and 207.18 is: 310.87
Step by Step Solution
- Step 1: Write the proportion equation
438.18 : 657.48 = 207.18 : x - Step 2: Convert to fraction form
438.18/657.48 = 207.18/x - Step 3: Cross multiply
438.18x = 657.48 × 207.18 - Step 4: Simplify right side
438.18x = 136,216.71 - Step 5: Solve for x
x = 136,216.71/438.18 - Step 6: Final answer
x = 310.87
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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.