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Finding the Fourth Proportional to 641,958.92, 885,903.22 and 355,479

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Solution

The fourth proportional to 641,958.92, 885,903.22 and 355,479 is: 490,560.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,958.92 : 885,903.22 = 355,479 : x
  2. Step 2: Convert to fraction form
    641,958.92/885,903.22 = 355,479/x
  3. Step 3: Cross multiply
    641,958.92x = 885,903.22 × 355,479
  4. Step 4: Simplify right side
    641,958.92x = 314,919,990,742.38
  5. Step 5: Solve for x
    x = 314,919,990,742.38/641,958.92
  6. Step 6: Final answer
    x = 490,560.97

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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.