Finding the Fourth Proportional to 645,175.43, 890,364.99 and 354,809.07
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Solution
The fourth proportional to 645,175.43, 890,364.99 and 354,809.07 is: 489,649.11
Step by Step Solution
- Step 1: Write the proportion equation
645,175.43 : 890,364.99 = 354,809.07 : x - Step 2: Convert to fraction form
645,175.43/890,364.99 = 354,809.07/x - Step 3: Cross multiply
645,175.43x = 890,364.99 × 354,809.07 - Step 4: Simplify right side
645,175.43x = 315,909,574,062.46 - Step 5: Solve for x
x = 315,909,574,062.46/645,175.43 - Step 6: Final answer
x = 489,649.11
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1.5x scale
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.