Finding the Fourth Proportional to 1,079,877.84, 1,489,691.70 and 643,987.68
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Solution
The fourth proportional to 1,079,877.84, 1,489,691.70 and 643,987.68 is: 888,381.14
Step by Step Solution
- Step 1: Write the proportion equation
1,079,877.84 : 1,489,691.70 = 643,987.68 : x - Step 2: Convert to fraction form
1,079,877.84/1,489,691.70 = 643,987.68/x - Step 3: Cross multiply
1,079,877.84x = 1,489,691.70 × 643,987.68 - Step 4: Simplify right side
1,079,877.84x = 959,343,101,798.26 - Step 5: Solve for x
x = 959,343,101,798.26/1,079,877.84 - Step 6: Final answer
x = 888,381.14
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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.