Finding the Fourth Proportional to 1,219,121.42, 1,828,769.76 and 420,391.40
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Solution
The fourth proportional to 1,219,121.42, 1,828,769.76 and 420,391.40 is: 630,617.32
Step by Step Solution
- Step 1: Write the proportion equation
1,219,121.42 : 1,828,769.76 = 420,391.40 : x - Step 2: Convert to fraction form
1,219,121.42/1,828,769.76 = 420,391.40/x - Step 3: Cross multiply
1,219,121.42x = 1,828,769.76 × 420,391.40 - Step 4: Simplify right side
1,219,121.42x = 768,799,079,684.06 - Step 5: Solve for x
x = 768,799,079,684.06/1,219,121.42 - Step 6: Final answer
x = 630,617.32
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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.