Finding the Fourth Proportional to 1,377,128.11, 1,900,315.75 and 765,242.09
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Solution
The fourth proportional to 1,377,128.11, 1,900,315.75 and 765,242.09 is: 1,055,966.82
Step by Step Solution
- Step 1: Write the proportion equation
1,377,128.11 : 1,900,315.75 = 765,242.09 : x - Step 2: Convert to fraction form
1,377,128.11/1,900,315.75 = 765,242.09/x - Step 3: Cross multiply
1,377,128.11x = 1,900,315.75 × 765,242.09 - Step 4: Simplify right side
1,377,128.11x = 1,454,201,596,189.92 - Step 5: Solve for x
x = 1,454,201,596,189.92/1,377,128.11 - Step 6: Final answer
x = 1,055,966.82
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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.