Finding the Fourth Proportional to 1,386,439.76, 1,912,958.97 and 805,317.59
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Solution
The fourth proportional to 1,386,439.76, 1,912,958.97 and 805,317.59 is: 1,111,147.81
Step by Step Solution
- Step 1: Write the proportion equation
1,386,439.76 : 1,912,958.97 = 805,317.59 : x - Step 2: Convert to fraction form
1,386,439.76/1,912,958.97 = 805,317.59/x - Step 3: Cross multiply
1,386,439.76x = 1,912,958.97 × 805,317.59 - Step 4: Simplify right side
1,386,439.76x = 1,540,539,509,251.74 - Step 5: Solve for x
x = 1,540,539,509,251.74/1,386,439.76 - Step 6: Final answer
x = 1,111,147.81
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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.