Finding the Fourth Proportional to 3,078,621.84, 4,248,686.76 and 1,720,603.28
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Solution
The fourth proportional to 3,078,621.84, 4,248,686.76 and 1,720,603.28 is: 2,374,537.94
Step by Step Solution
- Step 1: Write the proportion equation
3,078,621.84 : 4,248,686.76 = 1,720,603.28 : x - Step 2: Convert to fraction form
3,078,621.84/4,248,686.76 = 1,720,603.28/x - Step 3: Cross multiply
3,078,621.84x = 4,248,686.76 × 1,720,603.28 - Step 4: Simplify right side
3,078,621.84x = 7,310,304,374,948.57 - Step 5: Solve for x
x = 7,310,304,374,948.57/3,078,621.84 - Step 6: Final answer
x = 2,374,537.94
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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.