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Finding the Fourth Proportional to 323,618.40, 485,427.60 and 309,967.20

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Solution

The fourth proportional to 323,618.40, 485,427.60 and 309,967.20 is: 464,950.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,618.40 : 485,427.60 = 309,967.20 : x
  2. Step 2: Convert to fraction form
    323,618.40/485,427.60 = 309,967.20/x
  3. Step 3: Cross multiply
    323,618.40x = 485,427.60 × 309,967.20
  4. Step 4: Simplify right side
    323,618.40x = 150,466,633,974.72
  5. Step 5: Solve for x
    x = 150,466,633,974.72/323,618.40
  6. Step 6: Final answer
    x = 464,950.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.