Finding the Fourth Proportional to 280,199.12, 386,817.48 and 216,393.68
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Solution
The fourth proportional to 280,199.12, 386,817.48 and 216,393.68 is: 298,733.48
Step by Step Solution
- Step 1: Write the proportion equation
280,199.12 : 386,817.48 = 216,393.68 : x - Step 2: Convert to fraction form
280,199.12/386,817.48 = 216,393.68/x - Step 3: Cross multiply
280,199.12x = 386,817.48 × 216,393.68 - Step 4: Simplify right side
280,199.12x = 83,704,857,985.53 - Step 5: Solve for x
x = 83,704,857,985.53/280,199.12 - Step 6: Final answer
x = 298,733.48
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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.