Finding the Fourth Proportional to 764,518.70, 1,055,013.36 and 420,355.07
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Solution
The fourth proportional to 764,518.70, 1,055,013.36 and 420,355.07 is: 580,077.65
Step by Step Solution
- Step 1: Write the proportion equation
764,518.70 : 1,055,013.36 = 420,355.07 : x - Step 2: Convert to fraction form
764,518.70/1,055,013.36 = 420,355.07/x - Step 3: Cross multiply
764,518.70x = 1,055,013.36 × 420,355.07 - Step 4: Simplify right side
764,518.70x = 443,480,211,898.64 - Step 5: Solve for x
x = 443,480,211,898.64/764,518.70 - Step 6: Final answer
x = 580,077.65
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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.