Finding the Fourth Proportional to 286,686.36, 429,880.86 and 128,779.92
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Solution
The fourth proportional to 286,686.36, 429,880.86 and 128,779.92 is: 193,103.09
Step by Step Solution
- Step 1: Write the proportion equation
286,686.36 : 429,880.86 = 128,779.92 : x - Step 2: Convert to fraction form
286,686.36/429,880.86 = 128,779.92/x - Step 3: Cross multiply
286,686.36x = 429,880.86 × 128,779.92 - Step 4: Simplify right side
286,686.36x = 55,360,022,760.33 - Step 5: Solve for x
x = 55,360,022,760.33/286,686.36 - Step 6: Final answer
x = 193,103.09
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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.