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Finding the Fourth Proportional to 641,591.76, 885,382.68 and 355,094.64

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Solution

The fourth proportional to 641,591.76, 885,382.68 and 355,094.64 is: 490,022.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,591.76 : 885,382.68 = 355,094.64 : x
  2. Step 2: Convert to fraction form
    641,591.76/885,382.68 = 355,094.64/x
  3. Step 3: Cross multiply
    641,591.76x = 885,382.68 × 355,094.64
  4. Step 4: Simplify right side
    641,591.76x = 314,394,644,016.84
  5. Step 5: Solve for x
    x = 314,394,644,016.84/641,591.76
  6. Step 6: Final answer
    x = 490,022.88

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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.