Finding the Fourth Proportional to 921,640.56, 1,271,845.74 and 513,718.05
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Solution
The fourth proportional to 921,640.56, 1,271,845.74 and 513,718.05 is: 708,920.75
Step by Step Solution
- Step 1: Write the proportion equation
921,640.56 : 1,271,845.74 = 513,718.05 : x - Step 2: Convert to fraction form
921,640.56/1,271,845.74 = 513,718.05/x - Step 3: Cross multiply
921,640.56x = 1,271,845.74 × 513,718.05 - Step 4: Simplify right side
921,640.56x = 653,370,113,453.61 - Step 5: Solve for x
x = 653,370,113,453.61/921,640.56 - Step 6: Final answer
x = 708,920.75
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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.