Finding the Fourth Proportional to 1,289,509.20, 1,779,441.30 and 716,515.20
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Solution
The fourth proportional to 1,289,509.20, 1,779,441.30 and 716,515.20 is: 988,745.75
Step by Step Solution
- Step 1: Write the proportion equation
1,289,509.20 : 1,779,441.30 = 716,515.20 : x - Step 2: Convert to fraction form
1,289,509.20/1,779,441.30 = 716,515.20/x - Step 3: Cross multiply
1,289,509.20x = 1,779,441.30 × 716,515.20 - Step 4: Simplify right side
1,289,509.20x = 1,274,996,738,957.76 - Step 5: Solve for x
x = 1,274,996,738,957.76/1,289,509.20 - Step 6: Final answer
x = 988,745.75
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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.