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Finding the Fourth Proportional to 667,075.11, 920,563.94 and 361,151.48

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Solution

The fourth proportional to 667,075.11, 920,563.94 and 361,151.48 is: 498,389.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,075.11 : 920,563.94 = 361,151.48 : x
  2. Step 2: Convert to fraction form
    667,075.11/920,563.94 = 361,151.48/x
  3. Step 3: Cross multiply
    667,075.11x = 920,563.94 × 361,151.48
  4. Step 4: Simplify right side
    667,075.11x = 332,463,022,957.05
  5. Step 5: Solve for x
    x = 332,463,022,957.05/667,075.11
  6. Step 6: Final answer
    x = 498,389.19

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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.