Finding the Fourth Proportional to 390,215.26, 585,378.67 and 120,366.19
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Solution
The fourth proportional to 390,215.26, 585,378.67 and 120,366.19 is: 180,566.49
Step by Step Solution
- Step 1: Write the proportion equation
390,215.26 : 585,378.67 = 120,366.19 : x - Step 2: Convert to fraction form
390,215.26/585,378.67 = 120,366.19/x - Step 3: Cross multiply
390,215.26x = 585,378.67 × 120,366.19 - Step 4: Simplify right side
390,215.26x = 70,459,798,450.81 - Step 5: Solve for x
x = 70,459,798,450.81/390,215.26 - Step 6: Final answer
x = 180,566.49
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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.