Finding the Fourth Proportional to 7,171,279.20, 10,756,918.80 and 6,387,458.40
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Solution
The fourth proportional to 7,171,279.20, 10,756,918.80 and 6,387,458.40 is: 9,581,187.60
Step by Step Solution
- Step 1: Write the proportion equation
7,171,279.20 : 10,756,918.80 = 6,387,458.40 : x - Step 2: Convert to fraction form
7,171,279.20/10,756,918.80 = 6,387,458.40/x - Step 3: Cross multiply
7,171,279.20x = 10,756,918.80 × 6,387,458.40 - Step 4: Simplify right side
7,171,279.20x = 68,709,371,347,177.93 - Step 5: Solve for x
x = 68,709,371,347,177.93/7,171,279.20 - Step 6: Final answer
x = 9,581,187.60
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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.