Finding the Fourth Proportional to 280,721.40, 387,396.54 and 153,396.99
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Solution
The fourth proportional to 280,721.40, 387,396.54 and 153,396.99 is: 211,688.40
Step by Step Solution
- Step 1: Write the proportion equation
280,721.40 : 387,396.54 = 153,396.99 : x - Step 2: Convert to fraction form
280,721.40/387,396.54 = 153,396.99/x - Step 3: Cross multiply
280,721.40x = 387,396.54 × 153,396.99 - Step 4: Simplify right side
280,721.40x = 59,425,463,172.41 - Step 5: Solve for x
x = 59,425,463,172.41/280,721.40 - Step 6: Final answer
x = 211,688.40
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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.