Finding the Fourth Proportional to 1,290,749.75, 1,781,268.26 and 709,987.85
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Solution
The fourth proportional to 1,290,749.75, 1,781,268.26 and 709,987.85 is: 979,801.72
Step by Step Solution
- Step 1: Write the proportion equation
1,290,749.75 : 1,781,268.26 = 709,987.85 : x - Step 2: Convert to fraction form
1,290,749.75/1,781,268.26 = 709,987.85/x - Step 3: Cross multiply
1,290,749.75x = 1,781,268.26 × 709,987.85 - Step 4: Simplify right side
1,290,749.75x = 1,264,678,828,418.78 - Step 5: Solve for x
x = 1,264,678,828,418.78/1,290,749.75 - Step 6: Final answer
x = 979,801.72
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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.