Finding the Fourth Proportional to 420.53, 630.72 and 203.99
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Solution
The fourth proportional to 420.53, 630.72 and 203.99 is: 305.94
Step by Step Solution
- Step 1: Write the proportion equation
420.53 : 630.72 = 203.99 : x - Step 2: Convert to fraction form
420.53/630.72 = 203.99/x - Step 3: Cross multiply
420.53x = 630.72 × 203.99 - Step 4: Simplify right side
420.53x = 128,657.42 - Step 5: Solve for x
x = 128,657.42/420.53 - Step 6: Final answer
x = 305.94
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.