Finding the Fourth Proportional to 278,462.21, 417,626.40 and 128,558.48
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Solution
The fourth proportional to 278,462.21, 417,626.40 and 128,558.48 is: 192,806.82
Step by Step Solution
- Step 1: Write the proportion equation
278,462.21 : 417,626.40 = 128,558.48 : x - Step 2: Convert to fraction form
278,462.21/417,626.40 = 128,558.48/x - Step 3: Cross multiply
278,462.21x = 417,626.40 × 128,558.48 - Step 4: Simplify right side
278,462.21x = 53,689,413,585.83 - Step 5: Solve for x
x = 53,689,413,585.83/278,462.21 - Step 6: Final answer
x = 192,806.82
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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.