Finding the Fourth Proportional to 427,885.26, 641,789.64 and 128,432.70
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Solution
The fourth proportional to 427,885.26, 641,789.64 and 128,432.70 is: 192,637.57
Step by Step Solution
- Step 1: Write the proportion equation
427,885.26 : 641,789.64 = 128,432.70 : x - Step 2: Convert to fraction form
427,885.26/641,789.64 = 128,432.70/x - Step 3: Cross multiply
427,885.26x = 641,789.64 × 128,432.70 - Step 4: Simplify right side
427,885.26x = 82,426,776,297.23 - Step 5: Solve for x
x = 82,426,776,297.23/427,885.26 - Step 6: Final answer
x = 192,637.57
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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.