Finding the Fourth Proportional to 783.18, 1,174.70 and 371.70
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Solution
The fourth proportional to 783.18, 1,174.70 and 371.70 is: 557.52
Step by Step Solution
- Step 1: Write the proportion equation
783.18 : 1,174.70 = 371.70 : x - Step 2: Convert to fraction form
783.18/1,174.70 = 371.70/x - Step 3: Cross multiply
783.18x = 1,174.70 × 371.70 - Step 4: Simplify right side
783.18x = 436,635.99 - Step 5: Solve for x
x = 436,635.99/783.18 - Step 6: Final answer
x = 557.52
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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.