Finding the Fourth Proportional to 390.63, 539.19 and 224.95
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Solution
The fourth proportional to 390.63, 539.19 and 224.95 is: 310.51
Step by Step Solution
- Step 1: Write the proportion equation
390.63 : 539.19 = 224.95 : x - Step 2: Convert to fraction form
390.63/539.19 = 224.95/x - Step 3: Cross multiply
390.63x = 539.19 × 224.95 - Step 4: Simplify right side
390.63x = 121,293.19 - Step 5: Solve for x
x = 121,293.19/390.63 - Step 6: Final answer
x = 310.51
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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.