Finding the Fourth Proportional to 245,615.92, 338,991.40 and 142,235.08
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Solution
The fourth proportional to 245,615.92, 338,991.40 and 142,235.08 is: 196,308.40
Step by Step Solution
- Step 1: Write the proportion equation
245,615.92 : 338,991.40 = 142,235.08 : x - Step 2: Convert to fraction form
245,615.92/338,991.40 = 142,235.08/x - Step 3: Cross multiply
245,615.92x = 338,991.40 × 142,235.08 - Step 4: Simplify right side
245,615.92x = 48,216,468,898.31 - Step 5: Solve for x
x = 48,216,468,898.31/245,615.92 - Step 6: Final answer
x = 196,308.40
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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.