Finding the Fourth Proportional to 389.80, 585.06 and 207.28
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Solution
The fourth proportional to 389.80, 585.06 and 207.28 is: 311.11
Step by Step Solution
- Step 1: Write the proportion equation
389.80 : 585.06 = 207.28 : x - Step 2: Convert to fraction form
389.80/585.06 = 207.28/x - Step 3: Cross multiply
389.80x = 585.06 × 207.28 - Step 4: Simplify right side
389.80x = 121,271.24 - Step 5: Solve for x
x = 121,271.24/389.80 - Step 6: Final answer
x = 311.11
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.