Finding the Fourth Proportional to 361,415.20, 542,122.80 and 256,439.20
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Solution
The fourth proportional to 361,415.20, 542,122.80 and 256,439.20 is: 384,658.80
Step by Step Solution
- Step 1: Write the proportion equation
361,415.20 : 542,122.80 = 256,439.20 : x - Step 2: Convert to fraction form
361,415.20/542,122.80 = 256,439.20/x - Step 3: Cross multiply
361,415.20x = 542,122.80 × 256,439.20 - Step 4: Simplify right side
361,415.20x = 139,021,537,133.76 - Step 5: Solve for x
x = 139,021,537,133.76/361,415.20 - Step 6: Final answer
x = 384,658.80
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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.