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Finding the Fourth Proportional to 326,800.40, 490,103.40 and 127,005.80

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Solution

The fourth proportional to 326,800.40, 490,103.40 and 127,005.80 is: 190,470.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,800.40 : 490,103.40 = 127,005.80 : x
  2. Step 2: Convert to fraction form
    326,800.40/490,103.40 = 127,005.80/x
  3. Step 3: Cross multiply
    326,800.40x = 490,103.40 × 127,005.80
  4. Step 4: Simplify right side
    326,800.40x = 62,245,974,399.72
  5. Step 5: Solve for x
    x = 62,245,974,399.72/326,800.40
  6. Step 6: Final answer
    x = 190,470.92

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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.