Finding the Fourth Proportional to 687,437.08, 1,031,079.21 and 214,082.80
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Solution
The fourth proportional to 687,437.08, 1,031,079.21 and 214,082.80 is: 321,100.40
Step by Step Solution
- Step 1: Write the proportion equation
687,437.08 : 1,031,079.21 = 214,082.80 : x - Step 2: Convert to fraction form
687,437.08/1,031,079.21 = 214,082.80/x - Step 3: Cross multiply
687,437.08x = 1,031,079.21 × 214,082.80 - Step 4: Simplify right side
687,437.08x = 220,736,324,298.59 - Step 5: Solve for x
x = 220,736,324,298.59/687,437.08 - Step 6: Final answer
x = 321,100.40
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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.