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Finding the Fourth Proportional to 485,172.59, 669,542.74 and 267,389.21

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Solution

The fourth proportional to 485,172.59, 669,542.74 and 267,389.21 is: 368,999.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,172.59 : 669,542.74 = 267,389.21 : x
  2. Step 2: Convert to fraction form
    485,172.59/669,542.74 = 267,389.21/x
  3. Step 3: Cross multiply
    485,172.59x = 669,542.74 × 267,389.21
  4. Step 4: Simplify right side
    485,172.59x = 179,028,505,315.22
  5. Step 5: Solve for x
    x = 179,028,505,315.22/485,172.59
  6. Step 6: Final answer
    x = 368,999.63

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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.