Finding the Fourth Proportional to 1,290,271.52, 1,780,473.84 and 717,276.80
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Solution
The fourth proportional to 1,290,271.52, 1,780,473.84 and 717,276.80 is: 989,785.92
Step by Step Solution
- Step 1: Write the proportion equation
1,290,271.52 : 1,780,473.84 = 717,276.80 : x - Step 2: Convert to fraction form
1,290,271.52/1,780,473.84 = 717,276.80/x - Step 3: Cross multiply
1,290,271.52x = 1,780,473.84 × 717,276.80 - Step 4: Simplify right side
1,290,271.52x = 1,277,092,578,438.91 - Step 5: Solve for x
x = 1,277,092,578,438.91/1,290,271.52 - Step 6: Final answer
x = 989,785.92
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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.