Finding the Fourth Proportional to 3,121,987.10, 4,682,980.65 and 878,125.10
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Solution
The fourth proportional to 3,121,987.10, 4,682,980.65 and 878,125.10 is: 1,317,187.65
Step by Step Solution
- Step 1: Write the proportion equation
3,121,987.10 : 4,682,980.65 = 878,125.10 : x - Step 2: Convert to fraction form
3,121,987.10/4,682,980.65 = 878,125.10/x - Step 3: Cross multiply
3,121,987.10x = 4,682,980.65 × 878,125.10 - Step 4: Simplify right side
3,121,987.10x = 4,112,242,851,579.32 - Step 5: Solve for x
x = 4,112,242,851,579.32/3,121,987.10 - Step 6: Final answer
x = 1,317,187.65
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.