Finding the Fourth Proportional to 338,722.19, 508,083.52 and 86,021.63
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Solution
The fourth proportional to 338,722.19, 508,083.52 and 86,021.63 is: 129,032.50
Step by Step Solution
- Step 1: Write the proportion equation
338,722.19 : 508,083.52 = 86,021.63 : x - Step 2: Convert to fraction form
338,722.19/508,083.52 = 86,021.63/x - Step 3: Cross multiply
338,722.19x = 508,083.52 × 86,021.63 - Step 4: Simplify right side
338,722.19x = 43,706,172,566.54 - Step 5: Solve for x
x = 43,706,172,566.54/338,722.19 - Step 6: Final answer
x = 129,032.50
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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.