Finding the Fourth Proportional to 63.12, 86.98 and 49.31
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Solution
The fourth proportional to 63.12, 86.98 and 49.31 is: 67.95
Step by Step Solution
- Step 1: Write the proportion equation
63.12 : 86.98 = 49.31 : x - Step 2: Convert to fraction form
63.12/86.98 = 49.31/x - Step 3: Cross multiply
63.12x = 86.98 × 49.31 - Step 4: Simplify right side
63.12x = 4,288.98 - Step 5: Solve for x
x = 4,288.98/63.12 - Step 6: Final answer
x = 67.95
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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.