Finding the Fourth Proportional to 420,303.88, 630,461.30 and 139,821.12
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Solution
The fourth proportional to 420,303.88, 630,461.30 and 139,821.12 is: 209,733.50
Step by Step Solution
- Step 1: Write the proportion equation
420,303.88 : 630,461.30 = 139,821.12 : x - Step 2: Convert to fraction form
420,303.88/630,461.30 = 139,821.12/x - Step 3: Cross multiply
420,303.88x = 630,461.30 × 139,821.12 - Step 4: Simplify right side
420,303.88x = 88,151,805,082.66 - Step 5: Solve for x
x = 88,151,805,082.66/420,303.88 - Step 6: Final answer
x = 209,733.50
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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.