Finding the Fourth Proportional to 1,069,128.08, 1,475,396.66 and 639,408.19
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Solution
The fourth proportional to 1,069,128.08, 1,475,396.66 and 639,408.19 is: 882,383.25
Step by Step Solution
- Step 1: Write the proportion equation
1,069,128.08 : 1,475,396.66 = 639,408.19 : x - Step 2: Convert to fraction form
1,069,128.08/1,475,396.66 = 639,408.19/x - Step 3: Cross multiply
1,069,128.08x = 1,475,396.66 × 639,408.19 - Step 4: Simplify right side
1,069,128.08x = 943,380,707,902.65 - Step 5: Solve for x
x = 943,380,707,902.65/1,069,128.08 - Step 6: Final answer
x = 882,383.25
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.