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Finding the Fourth Proportional to 621,470.94, 857,695.68 and 379,894.92

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Solution

The fourth proportional to 621,470.94, 857,695.68 and 379,894.92 is: 524,295.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,470.94 : 857,695.68 = 379,894.92 : x
  2. Step 2: Convert to fraction form
    621,470.94/857,695.68 = 379,894.92/x
  3. Step 3: Cross multiply
    621,470.94x = 857,695.68 × 379,894.92
  4. Step 4: Simplify right side
    621,470.94x = 325,834,231,737.95
  5. Step 5: Solve for x
    x = 325,834,231,737.95/621,470.94
  6. Step 6: Final answer
    x = 524,295.20

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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.