Finding the Fourth Proportional to 288.98, 398.79 and 157.99
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Solution
The fourth proportional to 288.98, 398.79 and 157.99 is: 218.02
Step by Step Solution
- Step 1: Write the proportion equation
288.98 : 398.79 = 157.99 : x - Step 2: Convert to fraction form
288.98/398.79 = 157.99/x - Step 3: Cross multiply
288.98x = 398.79 × 157.99 - Step 4: Simplify right side
288.98x = 63,002.84 - Step 5: Solve for x
x = 63,002.84/288.98 - Step 6: Final answer
x = 218.02
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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.