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Finding the Fourth Proportional to 323,647.84, 485,028.42 and 205,402.15

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Solution

The fourth proportional to 323,647.84, 485,028.42 and 205,402.15 is: 307,821.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,647.84 : 485,028.42 = 205,402.15 : x
  2. Step 2: Convert to fraction form
    323,647.84/485,028.42 = 205,402.15/x
  3. Step 3: Cross multiply
    323,647.84x = 485,028.42 × 205,402.15
  4. Step 4: Simplify right side
    323,647.84x = 99,625,880,279.10
  5. Step 5: Solve for x
    x = 99,625,880,279.10/323,647.84
  6. Step 6: Final answer
    x = 307,821.86

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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.