Finding the Fourth Proportional to 420,201.19, 630,307.25 and 139,718.44
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Solution
The fourth proportional to 420,201.19, 630,307.25 and 139,718.44 is: 209,579.48
Step by Step Solution
- Step 1: Write the proportion equation
420,201.19 : 630,307.25 = 139,718.44 : x - Step 2: Convert to fraction form
420,201.19/630,307.25 = 139,718.44/x - Step 3: Cross multiply
420,201.19x = 630,307.25 × 139,718.44 - Step 4: Simplify right side
420,201.19x = 88,065,544,464.22 - Step 5: Solve for x
x = 88,065,544,464.22/420,201.19 - Step 6: Final answer
x = 209,579.48
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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.