Finding the Fourth Proportional to 368.68, 508.74 and 221.28
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Solution
The fourth proportional to 368.68, 508.74 and 221.28 is: 305.34
Step by Step Solution
- Step 1: Write the proportion equation
368.68 : 508.74 = 221.28 : x - Step 2: Convert to fraction form
368.68/508.74 = 221.28/x - Step 3: Cross multiply
368.68x = 508.74 × 221.28 - Step 4: Simplify right side
368.68x = 112,573.99 - Step 5: Solve for x
x = 112,573.99/368.68 - Step 6: Final answer
x = 305.34
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.