Finding the Fourth Proportional to 438,318.40, 657,477.60 and 420,603.70
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Solution
The fourth proportional to 438,318.40, 657,477.60 and 420,603.70 is: 630,905.55
Step by Step Solution
- Step 1: Write the proportion equation
438,318.40 : 657,477.60 = 420,603.70 : x - Step 2: Convert to fraction form
438,318.40/657,477.60 = 420,603.70/x - Step 3: Cross multiply
438,318.40x = 657,477.60 × 420,603.70 - Step 4: Simplify right side
438,318.40x = 276,537,511,227.12 - Step 5: Solve for x
x = 276,537,511,227.12/438,318.40 - Step 6: Final answer
x = 630,905.55
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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.