Finding the Fourth Proportional to 977.62, 1,349.18 and 558
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Solution
The fourth proportional to 977.62, 1,349.18 and 558 is: 770.08
Step by Step Solution
- Step 1: Write the proportion equation
977.62 : 1,349.18 = 558 : x - Step 2: Convert to fraction form
977.62/1,349.18 = 558/x - Step 3: Cross multiply
977.62x = 1,349.18 × 558 - Step 4: Simplify right side
977.62x = 752,842.44 - Step 5: Solve for x
x = 752,842.44/977.62 - Step 6: Final answer
x = 770.08
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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.