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Finding the Fourth Proportional to 621,701.80, 857,887.43 and 349,763.85

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Solution

The fourth proportional to 621,701.80, 857,887.43 and 349,763.85 is: 482,639.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,701.80 : 857,887.43 = 349,763.85 : x
  2. Step 2: Convert to fraction form
    621,701.80/857,887.43 = 349,763.85/x
  3. Step 3: Cross multiply
    621,701.80x = 857,887.43 × 349,763.85
  4. Step 4: Simplify right side
    621,701.80x = 300,058,008,634.59
  5. Step 5: Solve for x
    x = 300,058,008,634.59/621,701.80
  6. Step 6: Final answer
    x = 482,639.76

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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.