Finding the Fourth Proportional to 811,485.80, 1,217,228.70 and 212,445.80
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Solution
The fourth proportional to 811,485.80, 1,217,228.70 and 212,445.80 is: 318,668.70
Step by Step Solution
- Step 1: Write the proportion equation
811,485.80 : 1,217,228.70 = 212,445.80 : x - Step 2: Convert to fraction form
811,485.80/1,217,228.70 = 212,445.80/x - Step 3: Cross multiply
811,485.80x = 1,217,228.70 × 212,445.80 - Step 4: Simplify right side
811,485.80x = 258,595,124,954.46 - Step 5: Solve for x
x = 258,595,124,954.46/811,485.80 - Step 6: Final answer
x = 318,668.70
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1.5x scale
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.