Finding the Fourth Proportional to 986,856.21, 1,361,785.55 and 557,178.75
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Solution
The fourth proportional to 986,856.21, 1,361,785.55 and 557,178.75 is: 768,863.75
Step by Step Solution
- Step 1: Write the proportion equation
986,856.21 : 1,361,785.55 = 557,178.75 : x - Step 2: Convert to fraction form
986,856.21/1,361,785.55 = 557,178.75/x - Step 3: Cross multiply
986,856.21x = 1,361,785.55 × 557,178.75 - Step 4: Simplify right side
986,856.21x = 758,757,970,517.06 - Step 5: Solve for x
x = 758,757,970,517.06/986,856.21 - Step 6: Final answer
x = 768,863.75
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.