Finding the Fourth Proportional to 1,307,123.12, 1,960,684.44 and 420,659.12
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Solution
The fourth proportional to 1,307,123.12, 1,960,684.44 and 420,659.12 is: 630,988.60
Step by Step Solution
- Step 1: Write the proportion equation
1,307,123.12 : 1,960,684.44 = 420,659.12 : x - Step 2: Convert to fraction form
1,307,123.12/1,960,684.44 = 420,659.12/x - Step 3: Cross multiply
1,307,123.12x = 1,960,684.44 × 420,659.12 - Step 4: Simplify right side
1,307,123.12x = 824,779,791,128.09 - Step 5: Solve for x
x = 824,779,791,128.09/1,307,123.12 - Step 6: Final answer
x = 630,988.60
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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.