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Finding the Fourth Proportional to 621,624.78, 857,782.04 and 349,786.76

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Solution

The fourth proportional to 621,624.78, 857,782.04 and 349,786.76 is: 482,671.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,624.78 : 857,782.04 = 349,786.76 : x
  2. Step 2: Convert to fraction form
    621,624.78/857,782.04 = 349,786.76/x
  3. Step 3: Cross multiply
    621,624.78x = 857,782.04 × 349,786.76
  4. Step 4: Simplify right side
    621,624.78x = 300,040,794,519.95
  5. Step 5: Solve for x
    x = 300,040,794,519.95/621,624.78
  6. Step 6: Final answer
    x = 482,671.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.