Finding the Fourth Proportional to 280,547.28, 387,144.99 and 153,220.14
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Solution
The fourth proportional to 280,547.28, 387,144.99 and 153,220.14 is: 211,438.19
Step by Step Solution
- Step 1: Write the proportion equation
280,547.28 : 387,144.99 = 153,220.14 : x - Step 2: Convert to fraction form
280,547.28/387,144.99 = 153,220.14/x - Step 3: Cross multiply
280,547.28x = 387,144.99 × 153,220.14 - Step 4: Simplify right side
280,547.28x = 59,318,409,568.10 - Step 5: Solve for x
x = 59,318,409,568.10/280,547.28 - Step 6: Final answer
x = 211,438.19
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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.