Finding the Fourth Proportional to 1,128,921.62, 1,557,830.49 and 645,507.14
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Solution
The fourth proportional to 1,128,921.62, 1,557,830.49 and 645,507.14 is: 890,753.34
Step by Step Solution
- Step 1: Write the proportion equation
1,128,921.62 : 1,557,830.49 = 645,507.14 : x - Step 2: Convert to fraction form
1,128,921.62/1,557,830.49 = 645,507.14/x - Step 3: Cross multiply
1,128,921.62x = 1,557,830.49 × 645,507.14 - Step 4: Simplify right side
1,128,921.62x = 1,005,590,704,204.70 - Step 5: Solve for x
x = 1,005,590,704,204.70/1,128,921.62 - Step 6: Final answer
x = 890,753.34
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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.