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Finding the Fourth Proportional to 326,785.80, 490,178.70 and 116,430.60

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Solution

The fourth proportional to 326,785.80, 490,178.70 and 116,430.60 is: 174,645.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,785.80 : 490,178.70 = 116,430.60 : x
  2. Step 2: Convert to fraction form
    326,785.80/490,178.70 = 116,430.60/x
  3. Step 3: Cross multiply
    326,785.80x = 490,178.70 × 116,430.60
  4. Step 4: Simplify right side
    326,785.80x = 57,071,800,148.22
  5. Step 5: Solve for x
    x = 57,071,800,148.22/326,785.80
  6. Step 6: Final answer
    x = 174,645.90

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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.