Finding the Fourth Proportional to 278,523.20, 417,784.80 and 78,840.99
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Solution
The fourth proportional to 278,523.20, 417,784.80 and 78,840.99 is: 118,261.49
Step by Step Solution
- Step 1: Write the proportion equation
278,523.20 : 417,784.80 = 78,840.99 : x - Step 2: Convert to fraction form
278,523.20/417,784.80 = 78,840.99/x - Step 3: Cross multiply
278,523.20x = 417,784.80 × 78,840.99 - Step 4: Simplify right side
278,523.20x = 32,938,567,238.95 - Step 5: Solve for x
x = 32,938,567,238.95/278,523.20 - Step 6: Final answer
x = 118,261.49
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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.