Finding the Fourth Proportional to 665.58, 917.26 and 478.75
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Solution
The fourth proportional to 665.58, 917.26 and 478.75 is: 659.78
Step by Step Solution
- Step 1: Write the proportion equation
665.58 : 917.26 = 478.75 : x - Step 2: Convert to fraction form
665.58/917.26 = 478.75/x - Step 3: Cross multiply
665.58x = 917.26 × 478.75 - Step 4: Simplify right side
665.58x = 439,135.67 - Step 5: Solve for x
x = 439,135.67/665.58 - Step 6: Final answer
x = 659.78
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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.