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Finding the Fourth Proportional to 450,322.21, 621,342.90 and 268,998.65

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Solution

The fourth proportional to 450,322.21, 621,342.90 and 268,998.65 is: 371,157.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,322.21 : 621,342.90 = 268,998.65 : x
  2. Step 2: Convert to fraction form
    450,322.21/621,342.90 = 268,998.65/x
  3. Step 3: Cross multiply
    450,322.21x = 621,342.90 × 268,998.65
  4. Step 4: Simplify right side
    450,322.21x = 167,140,401,287.09
  5. Step 5: Solve for x
    x = 167,140,401,287.09/450,322.21
  6. Step 6: Final answer
    x = 371,157.36

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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.