Finding the Fourth Proportional to 642.68, 887.18 and 432.99
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Solution
The fourth proportional to 642.68, 887.18 and 432.99 is: 597.72
Step by Step Solution
- Step 1: Write the proportion equation
642.68 : 887.18 = 432.99 : x - Step 2: Convert to fraction form
642.68/887.18 = 432.99/x - Step 3: Cross multiply
642.68x = 887.18 × 432.99 - Step 4: Simplify right side
642.68x = 384,137.90 - Step 5: Solve for x
x = 384,137.90/642.68 - Step 6: Final answer
x = 597.72
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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.