Finding the Fourth Proportional to 515.84, 711.95 and 397.99
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Solution
The fourth proportional to 515.84, 711.95 and 397.99 is: 549.29
Step by Step Solution
- Step 1: Write the proportion equation
515.84 : 711.95 = 397.99 : x - Step 2: Convert to fraction form
515.84/711.95 = 397.99/x - Step 3: Cross multiply
515.84x = 711.95 × 397.99 - Step 4: Simplify right side
515.84x = 283,345.21 - Step 5: Solve for x
x = 283,345.21/515.84 - Step 6: Final answer
x = 549.29
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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.