Finding the Fourth Proportional to 280,449.50, 387,020.09 and 153,125.08
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Solution
The fourth proportional to 280,449.50, 387,020.09 and 153,125.08 is: 211,312.49
Step by Step Solution
- Step 1: Write the proportion equation
280,449.50 : 387,020.09 = 153,125.08 : x - Step 2: Convert to fraction form
280,449.50/387,020.09 = 153,125.08/x - Step 3: Cross multiply
280,449.50x = 387,020.09 × 153,125.08 - Step 4: Simplify right side
280,449.50x = 59,262,481,658.12 - Step 5: Solve for x
x = 59,262,481,658.12/280,449.50 - Step 6: Final answer
x = 211,312.49
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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.