Finding the Fourth Proportional to 645,489.90, 890,713.74 and 373,503.66
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Solution
The fourth proportional to 645,489.90, 890,713.74 and 373,503.66 is: 515,398.99
Step by Step Solution
- Step 1: Write the proportion equation
645,489.90 : 890,713.74 = 373,503.66 : x - Step 2: Convert to fraction form
645,489.90/890,713.74 = 373,503.66/x - Step 3: Cross multiply
645,489.90x = 890,713.74 × 373,503.66 - Step 4: Simplify right side
645,489.90x = 332,684,841,902.29 - Step 5: Solve for x
x = 332,684,841,902.29/645,489.90 - Step 6: Final answer
x = 515,398.99
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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.