Finding the Fourth Proportional to 1,387,513.20, 2,079,887.40 and 638,252.40
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Solution
The fourth proportional to 1,387,513.20, 2,079,887.40 and 638,252.40 is: 956,742.70
Step by Step Solution
- Step 1: Write the proportion equation
1,387,513.20 : 2,079,887.40 = 638,252.40 : x - Step 2: Convert to fraction form
1,387,513.20/2,079,887.40 = 638,252.40/x - Step 3: Cross multiply
1,387,513.20x = 2,079,887.40 × 638,252.40 - Step 4: Simplify right side
1,387,513.20x = 1,327,493,124,779.76 - Step 5: Solve for x
x = 1,327,493,124,779.76/1,387,513.20 - Step 6: Final answer
x = 956,742.70
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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.