Finding the Fourth Proportional to 485,573.86, 670,221.16 and 286,837.18
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Solution
The fourth proportional to 485,573.86, 670,221.16 and 286,837.18 is: 395,911.65
Step by Step Solution
- Step 1: Write the proportion equation
485,573.86 : 670,221.16 = 286,837.18 : x - Step 2: Convert to fraction form
485,573.86/670,221.16 = 286,837.18/x - Step 3: Cross multiply
485,573.86x = 670,221.16 × 286,837.18 - Step 4: Simplify right side
485,573.86x = 192,244,345,118.08 - Step 5: Solve for x
x = 192,244,345,118.08/485,573.86 - Step 6: Final answer
x = 395,911.65
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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.