Finding the Fourth Proportional to 272,904.19, 409,438.90 and 139,878.70
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Solution
The fourth proportional to 272,904.19, 409,438.90 and 139,878.70 is: 209,860.39
Step by Step Solution
- Step 1: Write the proportion equation
272,904.19 : 409,438.90 = 139,878.70 : x - Step 2: Convert to fraction form
272,904.19/409,438.90 = 139,878.70/x - Step 3: Cross multiply
272,904.19x = 409,438.90 × 139,878.70 - Step 4: Simplify right side
272,904.19x = 57,271,780,212.68 - Step 5: Solve for x
x = 57,271,780,212.68/272,904.19 - Step 6: Final answer
x = 209,860.39
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1.5x scale
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.