Finding the Fourth Proportional to 429.99, 643.32 and 285.99
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Solution
The fourth proportional to 429.99, 643.32 and 285.99 is: 427.88
Step by Step Solution
- Step 1: Write the proportion equation
429.99 : 643.32 = 285.99 : x - Step 2: Convert to fraction form
429.99/643.32 = 285.99/x - Step 3: Cross multiply
429.99x = 643.32 × 285.99 - Step 4: Simplify right side
429.99x = 183,983.09 - Step 5: Solve for x
x = 183,983.09/429.99 - Step 6: Final answer
x = 427.88
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.