Finding the Fourth Proportional to 479.70, 661.99 and 283.21
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Solution
The fourth proportional to 479.70, 661.99 and 283.21 is: 390.84
Step by Step Solution
- Step 1: Write the proportion equation
479.70 : 661.99 = 283.21 : x - Step 2: Convert to fraction form
479.70/661.99 = 283.21/x - Step 3: Cross multiply
479.70x = 661.99 × 283.21 - Step 4: Simplify right side
479.70x = 187,483.63 - Step 5: Solve for x
x = 187,483.63/479.70 - Step 6: Final answer
x = 390.84
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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.