Finding the Fourth Proportional to 630.99, 943.79 and 455.70
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Solution
The fourth proportional to 630.99, 943.79 and 455.70 is: 681.60
Step by Step Solution
- Step 1: Write the proportion equation
630.99 : 943.79 = 455.70 : x - Step 2: Convert to fraction form
630.99/943.79 = 455.70/x - Step 3: Cross multiply
630.99x = 943.79 × 455.70 - Step 4: Simplify right side
630.99x = 430,085.10 - Step 5: Solve for x
x = 430,085.10/630.99 - Step 6: Final answer
x = 681.60
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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.