Finding the Fourth Proportional to 438,326.40, 657,489.60 and 420,611.70
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Solution
The fourth proportional to 438,326.40, 657,489.60 and 420,611.70 is: 630,917.55
Step by Step Solution
- Step 1: Write the proportion equation
438,326.40 : 657,489.60 = 420,611.70 : x - Step 2: Convert to fraction form
438,326.40/657,489.60 = 420,611.70/x - Step 3: Cross multiply
438,326.40x = 657,489.60 × 420,611.70 - Step 4: Simplify right side
438,326.40x = 276,547,818,388.32 - Step 5: Solve for x
x = 276,547,818,388.32/438,326.40 - Step 6: Final answer
x = 630,917.55
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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.