Finding the Fourth Proportional to 645,244.11, 890,447.15 and 354,868.36
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Solution
The fourth proportional to 645,244.11, 890,447.15 and 354,868.36 is: 489,723.99
Step by Step Solution
- Step 1: Write the proportion equation
645,244.11 : 890,447.15 = 354,868.36 : x - Step 2: Convert to fraction form
645,244.11/890,447.15 = 354,868.36/x - Step 3: Cross multiply
645,244.11x = 890,447.15 × 354,868.36 - Step 4: Simplify right side
645,244.11x = 315,991,518,448.23 - Step 5: Solve for x
x = 315,991,518,448.23/645,244.11 - Step 6: Final answer
x = 489,723.99
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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.