Finding the Fourth Proportional to 438,427.10, 657,640.65 and 420,931.10
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Solution
The fourth proportional to 438,427.10, 657,640.65 and 420,931.10 is: 631,396.65
Step by Step Solution
- Step 1: Write the proportion equation
438,427.10 : 657,640.65 = 420,931.10 : x - Step 2: Convert to fraction form
438,427.10/657,640.65 = 420,931.10/x - Step 3: Cross multiply
438,427.10x = 657,640.65 × 420,931.10 - Step 4: Simplify right side
438,427.10x = 276,821,402,209.22 - Step 5: Solve for x
x = 276,821,402,209.22/438,427.10 - Step 6: Final answer
x = 631,396.65
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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.