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Finding the Fourth Proportional to 621,650.46, 930,470.13 and 321,718.80

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Solution

The fourth proportional to 621,650.46, 930,470.13 and 321,718.80 is: 481,540.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,650.46 : 930,470.13 = 321,718.80 : x
  2. Step 2: Convert to fraction form
    621,650.46/930,470.13 = 321,718.80/x
  3. Step 3: Cross multiply
    621,650.46x = 930,470.13 × 321,718.80
  4. Step 4: Simplify right side
    621,650.46x = 299,349,733,659.44
  5. Step 5: Solve for x
    x = 299,349,733,659.44/621,650.46
  6. Step 6: Final answer
    x = 481,540.28

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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.