Finding the Fourth Proportional to 430.39, 644.99 and 198.77
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Solution
The fourth proportional to 430.39, 644.99 and 198.77 is: 297.88
Step by Step Solution
- Step 1: Write the proportion equation
430.39 : 644.99 = 198.77 : x - Step 2: Convert to fraction form
430.39/644.99 = 198.77/x - Step 3: Cross multiply
430.39x = 644.99 × 198.77 - Step 4: Simplify right side
430.39x = 128,204.66 - Step 5: Solve for x
x = 128,204.66/430.39 - Step 6: Final answer
x = 297.88
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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.