Finding the Fourth Proportional to 438,138.45, 655,749.68 and 317,853.45
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Solution
The fourth proportional to 438,138.45, 655,749.68 and 317,853.45 is: 475,722.45
Step by Step Solution
- Step 1: Write the proportion equation
438,138.45 : 655,749.68 = 317,853.45 : x - Step 2: Convert to fraction form
438,138.45/655,749.68 = 317,853.45/x - Step 3: Cross multiply
438,138.45x = 655,749.68 × 317,853.45 - Step 4: Simplify right side
438,138.45x = 208,432,296,535.13 - Step 5: Solve for x
x = 208,432,296,535.13/438,138.45 - Step 6: Final answer
x = 475,722.45
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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.