Finding the Fourth Proportional to 1,290,424.68, 1,780,830.90 and 717,489
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Solution
The fourth proportional to 1,290,424.68, 1,780,830.90 and 717,489 is: 990,159.75
Step by Step Solution
- Step 1: Write the proportion equation
1,290,424.68 : 1,780,830.90 = 717,489 : x - Step 2: Convert to fraction form
1,290,424.68/1,780,830.90 = 717,489/x - Step 3: Cross multiply
1,290,424.68x = 1,780,830.90 × 717,489 - Step 4: Simplify right side
1,290,424.68x = 1,277,726,581,610.10 - Step 5: Solve for x
x = 1,277,726,581,610.10/1,290,424.68 - Step 6: Final answer
x = 990,159.75
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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.