Finding the Fourth Proportional to 420.30, 627.84 and 322.74
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Solution
The fourth proportional to 420.30, 627.84 and 322.74 is: 482.11
Step by Step Solution
- Step 1: Write the proportion equation
420.30 : 627.84 = 322.74 : x - Step 2: Convert to fraction form
420.30/627.84 = 322.74/x - Step 3: Cross multiply
420.30x = 627.84 × 322.74 - Step 4: Simplify right side
420.30x = 202,629.08 - Step 5: Solve for x
x = 202,629.08/420.30 - Step 6: Final answer
x = 482.11
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.