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Finding the Fourth Proportional to 323,807.40, 485,711.10 and 126,815.40

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Solution

The fourth proportional to 323,807.40, 485,711.10 and 126,815.40 is: 190,223.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,807.40 : 485,711.10 = 126,815.40 : x
  2. Step 2: Convert to fraction form
    323,807.40/485,711.10 = 126,815.40/x
  3. Step 3: Cross multiply
    323,807.40x = 485,711.10 × 126,815.40
  4. Step 4: Simplify right side
    323,807.40x = 61,595,647,430.94
  5. Step 5: Solve for x
    x = 61,595,647,430.94/323,807.40
  6. Step 6: Final answer
    x = 190,223.10

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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.