Finding the Fourth Proportional to 318.96, 442.08 and 313.74
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Solution
The fourth proportional to 318.96, 442.08 and 313.74 is: 434.85
Step by Step Solution
- Step 1: Write the proportion equation
318.96 : 442.08 = 313.74 : x - Step 2: Convert to fraction form
318.96/442.08 = 313.74/x - Step 3: Cross multiply
318.96x = 442.08 × 313.74 - Step 4: Simplify right side
318.96x = 138,698.18 - Step 5: Solve for x
x = 138,698.18/318.96 - Step 6: Final answer
x = 434.85
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These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.