Finding the Fourth Proportional to 1,128,719.58, 1,557,552.15 and 645,305.10
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Solution
The fourth proportional to 1,128,719.58, 1,557,552.15 and 645,305.10 is: 890,474.80
Step by Step Solution
- Step 1: Write the proportion equation
1,128,719.58 : 1,557,552.15 = 645,305.10 : x - Step 2: Convert to fraction form
1,128,719.58/1,557,552.15 = 645,305.10/x - Step 3: Cross multiply
1,128,719.58x = 1,557,552.15 × 645,305.10 - Step 4: Simplify right side
1,128,719.58x = 1,005,096,345,910.96 - Step 5: Solve for x
x = 1,005,096,345,910.96/1,128,719.58 - Step 6: Final answer
x = 890,474.80
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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.