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Finding the Fourth Proportional to 323,795.40, 485,693.10 and 289,969.80

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Solution

The fourth proportional to 323,795.40, 485,693.10 and 289,969.80 is: 434,954.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,795.40 : 485,693.10 = 289,969.80 : x
  2. Step 2: Convert to fraction form
    323,795.40/485,693.10 = 289,969.80/x
  3. Step 3: Cross multiply
    323,795.40x = 485,693.10 × 289,969.80
  4. Step 4: Simplify right side
    323,795.40x = 140,836,331,068.38
  5. Step 5: Solve for x
    x = 140,836,331,068.38/323,795.40
  6. Step 6: Final answer
    x = 434,954.70

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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.