Finding the Fourth Proportional to 1,290,408.49, 1,780,863.47 and 774,181.81
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Solution
The fourth proportional to 1,290,408.49, 1,780,863.47 and 774,181.81 is: 1,068,430.75
Step by Step Solution
- Step 1: Write the proportion equation
1,290,408.49 : 1,780,863.47 = 774,181.81 : x - Step 2: Convert to fraction form
1,290,408.49/1,780,863.47 = 774,181.81/x - Step 3: Cross multiply
1,290,408.49x = 1,780,863.47 × 774,181.81 - Step 4: Simplify right side
1,290,408.49x = 1,378,712,104,567.48 - Step 5: Solve for x
x = 1,378,712,104,567.48/1,290,408.49 - Step 6: Final answer
x = 1,068,430.75
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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.