Finding the Fourth Proportional to 1,122,137.47, 1,548,551.47 and 638,702.64
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Solution
The fourth proportional to 1,122,137.47, 1,548,551.47 and 638,702.64 is: 881,410.65
Step by Step Solution
- Step 1: Write the proportion equation
1,122,137.47 : 1,548,551.47 = 638,702.64 : x - Step 2: Convert to fraction form
1,122,137.47/1,548,551.47 = 638,702.64/x - Step 3: Cross multiply
1,122,137.47x = 1,548,551.47 × 638,702.64 - Step 4: Simplify right side
1,122,137.47x = 989,063,912,064.88 - Step 5: Solve for x
x = 989,063,912,064.88/1,122,137.47 - Step 6: Final answer
x = 881,410.65
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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.