Finding the Fourth Proportional to 391,865.21, 587,792.56 and 107,555.43
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Solution
The fourth proportional to 391,865.21, 587,792.56 and 107,555.43 is: 161,331.70
Step by Step Solution
- Step 1: Write the proportion equation
391,865.21 : 587,792.56 = 107,555.43 : x - Step 2: Convert to fraction form
391,865.21/587,792.56 = 107,555.43/x - Step 3: Cross multiply
391,865.21x = 587,792.56 × 107,555.43 - Step 4: Simplify right side
391,865.21x = 63,220,281,541.60 - Step 5: Solve for x
x = 63,220,281,541.60/391,865.21 - Step 6: Final answer
x = 161,331.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.