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Finding the Fourth Proportional to 641,960.58, 885,905.52 and 355,480.70

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Solution

The fourth proportional to 641,960.58, 885,905.52 and 355,480.70 is: 490,563.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,960.58 : 885,905.52 = 355,480.70 : x
  2. Step 2: Convert to fraction form
    641,960.58/885,905.52 = 355,480.70/x
  3. Step 3: Cross multiply
    641,960.58x = 885,905.52 × 355,480.70
  4. Step 4: Simplify right side
    641,960.58x = 314,922,314,383.46
  5. Step 5: Solve for x
    x = 314,922,314,383.46/641,960.58
  6. Step 6: Final answer
    x = 490,563.32

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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.