Finding the Fourth Proportional to 280,426.50, 386,986.57 and 153,102.09
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Solution
The fourth proportional to 280,426.50, 386,986.57 and 153,102.09 is: 211,279.79
Step by Step Solution
- Step 1: Write the proportion equation
280,426.50 : 386,986.57 = 153,102.09 : x - Step 2: Convert to fraction form
280,426.50/386,986.57 = 153,102.09/x - Step 3: Cross multiply
280,426.50x = 386,986.57 × 153,102.09 - Step 4: Simplify right side
280,426.50x = 59,248,451,903.42 - Step 5: Solve for x
x = 59,248,451,903.42/280,426.50 - Step 6: Final answer
x = 211,279.79
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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.