Finding the Fourth Proportional to 391,452.84, 540,186.84 and 221,688.18
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Solution
The fourth proportional to 391,452.84, 540,186.84 and 221,688.18 is: 305,919.45
Step by Step Solution
- Step 1: Write the proportion equation
391,452.84 : 540,186.84 = 221,688.18 : x - Step 2: Convert to fraction form
391,452.84/540,186.84 = 221,688.18/x - Step 3: Cross multiply
391,452.84x = 540,186.84 × 221,688.18 - Step 4: Simplify right side
391,452.84x = 119,753,037,419.55 - Step 5: Solve for x
x = 119,753,037,419.55/391,452.84 - Step 6: Final answer
x = 305,919.45
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.