Finding the Fourth Proportional to 393,209.83, 542,621.90 and 221,129.99
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Solution
The fourth proportional to 393,209.83, 542,621.90 and 221,129.99 is: 305,155.08
Step by Step Solution
- Step 1: Write the proportion equation
393,209.83 : 542,621.90 = 221,129.99 : x - Step 2: Convert to fraction form
393,209.83/542,621.90 = 221,129.99/x - Step 3: Cross multiply
393,209.83x = 542,621.90 × 221,129.99 - Step 4: Simplify right side
393,209.83x = 119,989,975,320.78 - Step 5: Solve for x
x = 119,989,975,320.78/393,209.83 - Step 6: Final answer
x = 305,155.08
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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.