Finding the Fourth Proportional to 280,520.65, 387,121.58 and 153,199.99
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Solution
The fourth proportional to 280,520.65, 387,121.58 and 153,199.99 is: 211,417.67
Step by Step Solution
- Step 1: Write the proportion equation
280,520.65 : 387,121.58 = 153,199.99 : x - Step 2: Convert to fraction form
280,520.65/387,121.58 = 153,199.99/x - Step 3: Cross multiply
280,520.65x = 387,121.58 × 153,199.99 - Step 4: Simplify right side
280,520.65x = 59,307,021,418.78 - Step 5: Solve for x
x = 59,307,021,418.78/280,520.65 - Step 6: Final answer
x = 211,417.67
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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.