Finding the Fourth Proportional to 245,807.09, 339,220.35 and 138,381.20
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Solution
The fourth proportional to 245,807.09, 339,220.35 and 138,381.20 is: 190,969.75
Step by Step Solution
- Step 1: Write the proportion equation
245,807.09 : 339,220.35 = 138,381.20 : x - Step 2: Convert to fraction form
245,807.09/339,220.35 = 138,381.20/x - Step 3: Cross multiply
245,807.09x = 339,220.35 × 138,381.20 - Step 4: Simplify right side
245,807.09x = 46,941,717,401.32 - Step 5: Solve for x
x = 46,941,717,401.32/245,807.09 - Step 6: Final answer
x = 190,969.75
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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.