Finding the Fourth Proportional to 1,489,588.20, 2,235,305.70 and 780,125.40
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Solution
The fourth proportional to 1,489,588.20, 2,235,305.70 and 780,125.40 is: 1,170,671.70
Step by Step Solution
- Step 1: Write the proportion equation
1,489,588.20 : 2,235,305.70 = 780,125.40 : x - Step 2: Convert to fraction form
1,489,588.20/2,235,305.70 = 780,125.40/x - Step 3: Cross multiply
1,489,588.20x = 2,235,305.70 × 780,125.40 - Step 4: Simplify right side
1,489,588.20x = 1,743,818,753,334.78 - Step 5: Solve for x
x = 1,743,818,753,334.78/1,489,588.20 - Step 6: Final answer
x = 1,170,671.70
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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.