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Finding the Fourth Proportional to 641,961.95, 885,896.58 and 355,475.88

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Solution

The fourth proportional to 641,961.95, 885,896.58 and 355,475.88 is: 490,550.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,961.95 : 885,896.58 = 355,475.88 : x
  2. Step 2: Convert to fraction form
    641,961.95/885,896.58 = 355,475.88/x
  3. Step 3: Cross multiply
    641,961.95x = 885,896.58 × 355,475.88
  4. Step 4: Simplify right side
    641,961.95x = 314,914,866,364.49
  5. Step 5: Solve for x
    x = 314,914,866,364.49/641,961.95
  6. Step 6: Final answer
    x = 490,550.68

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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.