Finding the Fourth Proportional to 259,612.30, 389,389.65 and 72,642.70
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Solution
The fourth proportional to 259,612.30, 389,389.65 and 72,642.70 is: 108,955.99
Step by Step Solution
- Step 1: Write the proportion equation
259,612.30 : 389,389.65 = 72,642.70 : x - Step 2: Convert to fraction form
259,612.30/389,389.65 = 72,642.70/x - Step 3: Cross multiply
259,612.30x = 389,389.65 × 72,642.70 - Step 4: Simplify right side
259,612.30x = 28,286,315,528.06 - Step 5: Solve for x
x = 28,286,315,528.06/259,612.30 - Step 6: Final answer
x = 108,955.99
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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.