Finding the Fourth Proportional to 1,128,920.62, 1,557,829.11 and 645,506.14
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Solution
The fourth proportional to 1,128,920.62, 1,557,829.11 and 645,506.14 is: 890,751.96
Step by Step Solution
- Step 1: Write the proportion equation
1,128,920.62 : 1,557,829.11 = 645,506.14 : x - Step 2: Convert to fraction form
1,128,920.62/1,557,829.11 = 645,506.14/x - Step 3: Cross multiply
1,128,920.62x = 1,557,829.11 × 645,506.14 - Step 4: Simplify right side
1,128,920.62x = 1,005,588,255,575.74 - Step 5: Solve for x
x = 1,005,588,255,575.74/1,128,920.62 - Step 6: Final answer
x = 890,751.96
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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.