Finding the Fourth Proportional to 393,044.99, 542,421.33 and 221,017.12
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Solution
The fourth proportional to 393,044.99, 542,421.33 and 221,017.12 is: 305,014.44
Step by Step Solution
- Step 1: Write the proportion equation
393,044.99 : 542,421.33 = 221,017.12 : x - Step 2: Convert to fraction form
393,044.99/542,421.33 = 221,017.12/x - Step 3: Cross multiply
393,044.99x = 542,421.33 × 221,017.12 - Step 4: Simplify right side
393,044.99x = 119,884,400,625.91 - Step 5: Solve for x
x = 119,884,400,625.91/393,044.99 - Step 6: Final answer
x = 305,014.44
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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.