Finding the Fourth Proportional to 628,647.12, 867,551.74 and 387,069.02
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Solution
The fourth proportional to 628,647.12, 867,551.74 and 387,069.02 is: 534,166.77
Step by Step Solution
- Step 1: Write the proportion equation
628,647.12 : 867,551.74 = 387,069.02 : x - Step 2: Convert to fraction form
628,647.12/867,551.74 = 387,069.02/x - Step 3: Cross multiply
628,647.12x = 867,551.74 × 387,069.02 - Step 4: Simplify right side
628,647.12x = 335,802,401,801.10 - Step 5: Solve for x
x = 335,802,401,801.10/628,647.12 - Step 6: Final answer
x = 534,166.77
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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.