Finding the Fourth Proportional to 1,128,963.57, 1,557,969.09 and 638,924.19
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Solution
The fourth proportional to 1,128,963.57, 1,557,969.09 and 638,924.19 is: 881,715.02
Step by Step Solution
- Step 1: Write the proportion equation
1,128,963.57 : 1,557,969.09 = 638,924.19 : x - Step 2: Convert to fraction form
1,128,963.57/1,557,969.09 = 638,924.19/x - Step 3: Cross multiply
1,128,963.57x = 1,557,969.09 × 638,924.19 - Step 4: Simplify right side
1,128,963.57x = 995,424,138,873.29 - Step 5: Solve for x
x = 995,424,138,873.29/1,128,963.57 - Step 6: Final answer
x = 881,715.02
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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.