Finding the Fourth Proportional to 689,490.75, 1,034,236.13 and 216,213.01
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Solution
The fourth proportional to 689,490.75, 1,034,236.13 and 216,213.01 is: 324,319.52
Step by Step Solution
- Step 1: Write the proportion equation
689,490.75 : 1,034,236.13 = 216,213.01 : x - Step 2: Convert to fraction form
689,490.75/1,034,236.13 = 216,213.01/x - Step 3: Cross multiply
689,490.75x = 1,034,236.13 × 216,213.01 - Step 4: Simplify right side
689,490.75x = 223,615,306,718.05 - Step 5: Solve for x
x = 223,615,306,718.05/689,490.75 - Step 6: Final answer
x = 324,319.52
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Double scale
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Similar ratio
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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.