Finding the Fourth Proportional to 280,780.12, 387,475.64 and 153,455.68
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Solution
The fourth proportional to 280,780.12, 387,475.64 and 153,455.68 is: 211,768.33
Step by Step Solution
- Step 1: Write the proportion equation
280,780.12 : 387,475.64 = 153,455.68 : x - Step 2: Convert to fraction form
280,780.12/387,475.64 = 153,455.68/x - Step 3: Cross multiply
280,780.12x = 387,475.64 × 153,455.68 - Step 4: Simplify right side
280,780.12x = 59,460,337,819.64 - Step 5: Solve for x
x = 59,460,337,819.64/280,780.12 - Step 6: Final answer
x = 211,768.33
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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.