Finding the Fourth Proportional to 1,315,415.12, 1,815,277.68 and 711,803.12
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Solution
The fourth proportional to 1,315,415.12, 1,815,277.68 and 711,803.12 is: 982,290.91
Step by Step Solution
- Step 1: Write the proportion equation
1,315,415.12 : 1,815,277.68 = 711,803.12 : x - Step 2: Convert to fraction form
1,315,415.12/1,815,277.68 = 711,803.12/x - Step 3: Cross multiply
1,315,415.12x = 1,815,277.68 × 711,803.12 - Step 4: Simplify right side
1,315,415.12x = 1,292,120,316,290.36 - Step 5: Solve for x
x = 1,292,120,316,290.36/1,315,415.12 - Step 6: Final answer
x = 982,290.91
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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.