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Finding the Fourth Proportional to 621,309.75, 930,469.92 and 354,260.64

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Solution

The fourth proportional to 621,309.75, 930,469.92 and 354,260.64 is: 530,538.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,309.75 : 930,469.92 = 354,260.64 : x
  2. Step 2: Convert to fraction form
    621,309.75/930,469.92 = 354,260.64/x
  3. Step 3: Cross multiply
    621,309.75x = 930,469.92 × 354,260.64
  4. Step 4: Simplify right side
    621,309.75x = 329,628,869,359.95
  5. Step 5: Solve for x
    x = 329,628,869,359.95/621,309.75
  6. Step 6: Final answer
    x = 530,538.70

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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.