Finding the Fourth Proportional to 515.84, 711.84 and 291.78
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Solution
The fourth proportional to 515.84, 711.84 and 291.78 is: 402.65
Step by Step Solution
- Step 1: Write the proportion equation
515.84 : 711.84 = 291.78 : x - Step 2: Convert to fraction form
515.84/711.84 = 291.78/x - Step 3: Cross multiply
515.84x = 711.84 × 291.78 - Step 4: Simplify right side
515.84x = 207,702.36 - Step 5: Solve for x
x = 207,702.36/515.84 - Step 6: Final answer
x = 402.65
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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.