Finding the Fourth Proportional to 420,655.74, 630,985.26 and 105,112.98
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Solution
The fourth proportional to 420,655.74, 630,985.26 and 105,112.98 is: 157,669.88
Step by Step Solution
- Step 1: Write the proportion equation
420,655.74 : 630,985.26 = 105,112.98 : x - Step 2: Convert to fraction form
420,655.74/630,985.26 = 105,112.98/x - Step 3: Cross multiply
420,655.74x = 630,985.26 × 105,112.98 - Step 4: Simplify right side
420,655.74x = 66,324,741,014.67 - Step 5: Solve for x
x = 66,324,741,014.67/420,655.74 - Step 6: Final answer
x = 157,669.88
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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.