Finding the Fourth Proportional to 420,220.29, 579,931.41 and 238,949.09
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Solution
The fourth proportional to 420,220.29, 579,931.41 and 238,949.09 is: 329,765.33
Step by Step Solution
- Step 1: Write the proportion equation
420,220.29 : 579,931.41 = 238,949.09 : x - Step 2: Convert to fraction form
420,220.29/579,931.41 = 238,949.09/x - Step 3: Cross multiply
420,220.29x = 579,931.41 × 238,949.09 - Step 4: Simplify right side
420,220.29x = 138,574,081,957.00 - Step 5: Solve for x
x = 138,574,081,957.00/420,220.29 - Step 6: Final answer
x = 329,765.33
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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.