Finding the Fourth Proportional to 390.59, 586.11 and 207.99
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Solution
The fourth proportional to 390.59, 586.11 and 207.99 is: 312.10
Step by Step Solution
- Step 1: Write the proportion equation
390.59 : 586.11 = 207.99 : x - Step 2: Convert to fraction form
390.59/586.11 = 207.99/x - Step 3: Cross multiply
390.59x = 586.11 × 207.99 - Step 4: Simplify right side
390.59x = 121,905.02 - Step 5: Solve for x
x = 121,905.02/390.59 - Step 6: Final answer
x = 312.10
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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.