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Finding the Fourth Proportional to 641,660.52, 885,480.78 and 355,174.44

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Solution

The fourth proportional to 641,660.52, 885,480.78 and 355,174.44 is: 490,134.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,660.52 : 885,480.78 = 355,174.44 : x
  2. Step 2: Convert to fraction form
    641,660.52/885,480.78 = 355,174.44/x
  3. Step 3: Cross multiply
    641,660.52x = 885,480.78 × 355,174.44
  4. Step 4: Simplify right side
    641,660.52x = 314,500,140,167.26
  5. Step 5: Solve for x
    x = 314,500,140,167.26/641,660.52
  6. Step 6: Final answer
    x = 490,134.78

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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.