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Finding the Fourth Proportional to 621,640.83, 857,863.08 and 349,708.92

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Solution

The fourth proportional to 621,640.83, 857,863.08 and 349,708.92 is: 482,597.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,640.83 : 857,863.08 = 349,708.92 : x
  2. Step 2: Convert to fraction form
    621,640.83/857,863.08 = 349,708.92/x
  3. Step 3: Cross multiply
    621,640.83x = 857,863.08 × 349,708.92
  4. Step 4: Simplify right side
    621,640.83x = 300,002,371,214.67
  5. Step 5: Solve for x
    x = 300,002,371,214.67/621,640.83
  6. Step 6: Final answer
    x = 482,597.60

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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.