Finding the Fourth Proportional to 256,139.70, 384,209.55 and 138,041.70
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Solution
The fourth proportional to 256,139.70, 384,209.55 and 138,041.70 is: 207,062.55
Step by Step Solution
- Step 1: Write the proportion equation
256,139.70 : 384,209.55 = 138,041.70 : x - Step 2: Convert to fraction form
256,139.70/384,209.55 = 138,041.70/x - Step 3: Cross multiply
256,139.70x = 384,209.55 × 138,041.70 - Step 4: Simplify right side
256,139.70x = 53,036,939,438.24 - Step 5: Solve for x
x = 53,036,939,438.24/256,139.70 - Step 6: Final answer
x = 207,062.55
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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.