Finding the Fourth Proportional to 660,781.44, 990,820.80 and 261,406.08
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Solution
The fourth proportional to 660,781.44, 990,820.80 and 261,406.08 is: 391,970.12
Step by Step Solution
- Step 1: Write the proportion equation
660,781.44 : 990,820.80 = 261,406.08 : x - Step 2: Convert to fraction form
660,781.44/990,820.80 = 261,406.08/x - Step 3: Cross multiply
660,781.44x = 990,820.80 × 261,406.08 - Step 4: Simplify right side
660,781.44x = 259,006,581,310.46 - Step 5: Solve for x
x = 259,006,581,310.46/660,781.44 - Step 6: Final answer
x = 391,970.12
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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.