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Finding the Fourth Proportional to 621,694.66, 857,937.30 and 349,762.74

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Solution

The fourth proportional to 621,694.66, 857,937.30 and 349,762.74 is: 482,671.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,694.66 : 857,937.30 = 349,762.74 : x
  2. Step 2: Convert to fraction form
    621,694.66/857,937.30 = 349,762.74/x
  3. Step 3: Cross multiply
    621,694.66x = 857,937.30 × 349,762.74
  4. Step 4: Simplify right side
    621,694.66x = 300,074,500,796.20
  5. Step 5: Solve for x
    x = 300,074,500,796.20/621,694.66
  6. Step 6: Final answer
    x = 482,671.83

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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.