Finding the Fourth Proportional to 860,115.49, 1,290,328.78 and 354,395.13
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Solution
The fourth proportional to 860,115.49, 1,290,328.78 and 354,395.13 is: 531,656.78
Step by Step Solution
- Step 1: Write the proportion equation
860,115.49 : 1,290,328.78 = 354,395.13 : x - Step 2: Convert to fraction form
860,115.49/1,290,328.78 = 354,395.13/x - Step 3: Cross multiply
860,115.49x = 1,290,328.78 × 354,395.13 - Step 4: Simplify right side
860,115.49x = 457,286,229,279.20 - Step 5: Solve for x
x = 457,286,229,279.20/860,115.49 - Step 6: Final answer
x = 531,656.78
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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.