Finding the Fourth Proportional to 812,919.62, 1,121,829.12 and 445,398.32
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Solution
The fourth proportional to 812,919.62, 1,121,829.12 and 445,398.32 is: 614,649.70
Step by Step Solution
- Step 1: Write the proportion equation
812,919.62 : 1,121,829.12 = 445,398.32 : x - Step 2: Convert to fraction form
812,919.62/1,121,829.12 = 445,398.32/x - Step 3: Cross multiply
812,919.62x = 1,121,829.12 × 445,398.32 - Step 4: Simplify right side
812,919.62x = 499,660,799,765.93 - Step 5: Solve for x
x = 499,660,799,765.93/812,919.62 - Step 6: Final answer
x = 614,649.70
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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.