Finding the Fourth Proportional to 420.09, 626.03 and 415.99
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Solution
The fourth proportional to 420.09, 626.03 and 415.99 is: 619.92
Step by Step Solution
- Step 1: Write the proportion equation
420.09 : 626.03 = 415.99 : x - Step 2: Convert to fraction form
420.09/626.03 = 415.99/x - Step 3: Cross multiply
420.09x = 626.03 × 415.99 - Step 4: Simplify right side
420.09x = 260,418.96 - Step 5: Solve for x
x = 260,418.96/420.09 - Step 6: Final answer
x = 619.92
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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.